{"product_id":"cal-mag-plus-2-0-0-concentrate","title":"Cal-Mag Plus 2-0-0 Concentrate","description":"\u003c!-- ═══════════════════════════════════════════════════════════════\n     CAL-MAG PLUS 2-0-0 - Greenway Biotech Product Page\n     Version: 2.7.1 | Updated: April 2026\n     Architecture: Modular CSS + Dispatcher Calculator Pattern\n     CSS: gwb-product-styles.css v2.3.0\n     Calculator: calmag-calculator.js (dispatcher: gwb-calculators.js v5.2+)\n     Blog Articles Linked: 4 (Calcium \u0026 Magnesium Deficiencies, Hydroponic Nutrient Guide, Coco Coir Growing Tips, 4-Part Hydroponic System)\n     Blog Articles TODO: 2 needed\n     ═══════════════════════════════════════════════════════════════ --\u003e\n\n\u003cdiv class=\"gwb-product\"\u003e\n\u003cdiv class=\"wrapper\"\u003e\n\n\u003c!-- HERO --\u003e\n\u003ch1\u003eCal-Mag Plus \u003cspan class=\"green\"\u003e2-0-0\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp class=\"hero-subtitle\"\u003e\u003cstrong\u003eEssential foundation of our 4-part hydroponic system. Premium chelated calcium, magnesium, and iron can significantly reduce deficiencies and strengthen plants from seed to harvest. Save substantially vs. liquid Cal-Mag.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003c!-- TRUST BADGES (1 product-specific + 3 universal) --\u003e\n\u003cdiv class=\"trust-badges\"\u003e\n  \u003ca href=\"\/pages\/certificates\" target=\"_blank\" rel=\"noopener\" class=\"badge\" aria-label=\"CDFA Registered Fertilizer\"\u003e🧪 CDFA Registered\u003c\/a\u003e\n  \u003ca href=\"\/pages\/about-us\" target=\"_blank\" rel=\"noopener noreferrer\" class=\"badge\" aria-label=\"Made in USA\"\u003e🇺🇸 Made in USA\u003c\/a\u003e\n  \u003cspan class=\"badge\" aria-label=\"90-Day Money-Back Guarantee\"\u003e🛡️ 90-Day Guarantee\u003c\/span\u003e\n  \u003ca href=\"\/pages\/returns\" target=\"_blank\" rel=\"noopener noreferrer\" class=\"badge\" aria-label=\"Free Shipping on orders over 100 dollars\"\u003e🚚 Free Shipping $100+\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003c!-- IDEAL APPLICATIONS (always visible) --\u003e\n\u003csection class=\"best-for\"\u003e\n  \u003ch2\u003eIdeal Applications\u003c\/h2\u003e\n  \u003cdiv class=\"best-for-grid\"\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e💧\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003eRO\/Distilled Water\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003e10 ml\/gal full strength\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e🥥\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003eCoco Coir\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003eEvery watering\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e💡\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003eLED Grows\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003e+25% rate needed\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e🌟\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003e4-Part Hydroponic System\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003e2.5–10 ml\/gal by stage\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e🍃\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003eFoliar Spray\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003e5 ml\/gal quick correction\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e🍅\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003eTomatoes \u0026amp; Peppers\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003eReduces blossom-end rot risk\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003c!-- 1. FEATURES --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eFEATURES\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cdiv class=\"benefits-grid\"\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🎯 Balanced Ca-Mg-Fe Ratio\u003c\/h3\u003e\n        \u003cp\u003e3.2% calcium, 1.2% magnesium, and 0.1% chelated iron in a single formula designed to address the most common hydroponic deficiencies.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e💧 100% Water Soluble\u003c\/h3\u003e\n        \u003cp\u003eDissolves rapidly with minimal residue—safe for drip emitters, aeroponic misters, and recirculating NFT systems.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e💰 Significant Cost Savings\u003c\/h3\u003e\n        \u003cp\u003eConcentrated powder ships nutrients, not water. One 5 lb bag can replace multiple gallons of liquid Cal-Mag at a fraction of the cost.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🛡️ Deficiency Prevention\u003c\/h3\u003e\n        \u003cp\u003eCan significantly reduce the risk of blossom-end rot, tip burn, and interveinal chlorosis—consistent use makes prevention far more manageable than correction.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🔬 Chelated Iron EDTA\u003c\/h3\u003e\n        \u003cp\u003eEDTA-chelated iron remains plant-available at pH 5.0–6.5, helping prevent new growth yellowing common in hydroponic systems. Maintain pH 5.8–6.2 for best iron uptake.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e⏰ Long Shelf Life\u003c\/h3\u003e\n        \u003cp\u003eLong shelf life when stored sealed and dry—far less waste compared to liquid products with fixed expiration dates.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🥥 Essential for Coco Coir\u003c\/h3\u003e\n        \u003cp\u003eCoco naturally binds calcium, making deficiency very likely even with tap water. Cal-Mag every watering helps prevent cation exchange lockout.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🌿 Eco-Friendly Shipping\u003c\/h3\u003e\n        \u003cp\u003eSignificantly less shipping weight than liquid alternatives reduces carbon emissions and packaging waste.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🧪 Tested for Heavy Metals\u003c\/h3\u003e\n        \u003cp\u003eThird-party lab tested for purity and heavy metal content, with results consistently well below required limits. CDFA registered to meet California's strict agricultural standards.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e⚙️ 4-Part System Foundation\u003c\/h3\u003e\n        \u003cp\u003eDesigned as the first component added to water in our complete hydroponic feeding system—Cal-Mag, Grow, Micro, and Bloom.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- 2. DERIVED FROM --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eDERIVED FROM\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cp\u003eCal-Mag Plus uses pharmaceutical-grade mineral sources selected for maximum solubility and immediate plant availability. No chlorides, no fillers.\u003c\/p\u003e\n\n    \u003ch3 class=\"brown\"\u003eMacronutrient Sources\u003c\/h3\u003e\n    \u003cdiv class=\"pairs-grid\"\u003e\n      \u003ca href=\"\/products\/calcium-nitrate\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003ch3\u003eCalcium Nitrate\u003c\/h3\u003e\n        \u003cp\u003eFast-acting, fully soluble calcium source that also provides nitrate nitrogen for immediate uptake.\u003c\/p\u003e\n      \u003c\/a\u003e\n      \u003ca href=\"\/products\/magnesium-nitrate-fertilizer-11-0-0\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003ch3\u003eMagnesium Nitrate\u003c\/h3\u003e\n        \u003cp\u003eHighly soluble magnesium essential for chlorophyll production and photosynthesis efficiency.\u003c\/p\u003e\n      \u003c\/a\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 class=\"brown\"\u003eMicronutrient Sources\u003c\/h3\u003e\n    \u003cdiv class=\"pairs-grid\"\u003e\n      \u003ca href=\"\/products\/chelated-iron-edta\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003ch3\u003eChelated Iron EDTA\u003c\/h3\u003e\n        \u003cp\u003eEDTA-protected iron remains plant-available at pH 5.0–6.5 for consistent chlorophyll synthesis. Keeping nutrient solution pH at 5.8–6.2 maximizes iron uptake.\u003c\/p\u003e\n      \u003c\/a\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- 3. SCIENCE BEHIND THE FORMULA --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eSCIENCE BEHIND THE FORMULA\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cdiv class=\"info-box\"\u003e\n      \u003ch3 class=\"teal\"\u003e2-0-0 + Ca + Mg + Fe: Precision Formulation for Hydroponics\u003c\/h3\u003e\n      \u003cp\u003eCal-Mag Plus provides the essential secondary nutrients that base fertilizers lack. The 2% nitrogen comes from nitrate sources for immediate plant availability, while calcium, magnesium, and chelated iron address the three most common hydroponic deficiencies.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- NPK + Secondary Nutrient Cards --\u003e\n    \u003cdiv class=\"benefits-grid\"\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🌿 Nitrogen — 2% (Nitrate Form)\u003c\/h3\u003e\n        \u003cp\u003eLow nitrogen from nitrate sources provides immediate availability without competing with the primary base fertilizer's nitrogen delivery.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e💪 Calcium — 3.2% (Cell Wall Integrity)\u003c\/h3\u003e\n        \u003cp\u003eCalcium is essential for cell wall integrity and may help reduce the risk of blossom-end rot, tip burn, and structural weakness—particularly during rapid growth phases when demand spikes.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🍀 Magnesium — 1.2% (Chlorophyll Core)\u003c\/h3\u003e\n        \u003cp\u003eCentral atom in every chlorophyll molecule. Deficiency causes interveinal chlorosis—yellowing between veins on older leaves that moves upward.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🔬 Iron — 0.1% EDTA (Chelated Stability)\u003c\/h3\u003e\n        \u003cp\u003eEDTA chelation keeps iron plant-available at pH 5.0–6.5. Maintain nutrient solution at 5.8–6.2 to prevent new growth yellowing; EDTA stability decreases above 6.5.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- Why Cal-Mag Plus subsection --\u003e\n    \u003ch3 class=\"brown\"\u003eWhy Cal-Mag Is Your First Pour\u003c\/h3\u003e\n    \u003cdiv class=\"benefits-grid\"\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e💧 RO Water Has Nothing\u003c\/h3\u003e\n        \u003cp\u003eReverse osmosis and distilled water start at 0 EC with zero minerals. Cal-Mag replaces what purification removes before adding base nutrients.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🥥 Coco Binds Calcium\u003c\/h3\u003e\n        \u003cp\u003eCoco coir's cation exchange sites bind calcium and magnesium, releasing sodium and potassium instead. Without consistent Cal-Mag supplementation, calcium and magnesium deficiency is very likely—even with calcium-rich tap water.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e💡 LED Increases Demand\u003c\/h3\u003e\n        \u003cp\u003eHigh-intensity indoor environments can increase calcium demand and expose delivery limitations, especially during rapid growth. Growers using high-output LEDs often find increasing Cal-Mag by 25% helps maintain adequate calcium levels.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- Visual Results Timeline --\u003e\n    \u003ch3 class=\"brown\"\u003eDeficiency Prevention Timeline\u003c\/h3\u003e\n    \u003cdiv class=\"timeline\"\u003e\n      \u003cdiv class=\"timeline-item\"\u003e\n        \u003cspan class=\"day\"\u003eDay 1\u003c\/span\u003e\n        \u003cspan class=\"icon\" aria-hidden=\"true\"\u003e💧\u003c\/span\u003e\n        \u003cspan\u003eAdd first to water before other nutrients\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"timeline-item\"\u003e\n        \u003cspan class=\"day\"\u003eDay 3–5\u003c\/span\u003e\n        \u003cspan class=\"icon\" aria-hidden=\"true\"\u003e🌱\u003c\/span\u003e\n        \u003cspan\u003eSupports healthy Ca\/Mg\/Fe availability; reduces risk of deficiency-related lockout\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"timeline-item\"\u003e\n        \u003cspan class=\"day\"\u003eWeek 2\u003c\/span\u003e\n        \u003cspan class=\"icon\" aria-hidden=\"true\"\u003e💪\u003c\/span\u003e\n        \u003cspan\u003eStronger stems and cell walls\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"timeline-item\"\u003e\n        \u003cspan class=\"day\"\u003eOngoing\u003c\/span\u003e\n        \u003cspan class=\"icon\" aria-hidden=\"true\"\u003e🛡️\u003c\/span\u003e\n        \u003cspan\u003eContinuous deficiency prevention\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- (Optional) PROBLEM\/SOLUTION GRID --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eCOMMON DEFICIENCY PROBLEMS AND SOLUTIONS\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cdiv class=\"problem-solution-grid\"\u003e\n      \u003cdiv class=\"ps-item\"\u003e\n        \u003cdiv class=\"problem\"\u003eBlossom-end rot on tomatoes?\u003c\/div\u003e\n        \u003cdiv class=\"solution\"\u003e3.2% calcium can significantly reduce the risk\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ps-item\"\u003e\n        \u003cdiv class=\"problem\"\u003eYellow between leaf veins?\u003c\/div\u003e\n        \u003cdiv class=\"solution\"\u003e1.2% magnesium supports green recovery\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ps-item\"\u003e\n        \u003cdiv class=\"problem\"\u003eWeak stems and brown tips?\u003c\/div\u003e\n        \u003cdiv class=\"solution\"\u003eCalcium supports cell wall integrity throughout\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"ps-item\"\u003e\n        \u003cdiv class=\"problem\"\u003eUsing RO or distilled water?\u003c\/div\u003e\n        \u003cdiv class=\"solution\"\u003eHelps restore key calcium, magnesium, and iron often missing from purified water\u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- 4. APPLICATION RATES \u0026 DIRECTIONS --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eAPPLICATION RATES \u0026amp; DIRECTIONS\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cp\u003eCal-Mag Plus is the foundation of our 4-part system. Always add it FIRST to your water before any other nutrients to help prevent precipitation.\u003c\/p\u003e\n\n    \u003ch3 class=\"brown\"\u003eStock Solution Preparation\u003c\/h3\u003e\n    \u003cdiv class=\"table-scroll\"\u003e\n      \u003ctable\u003e\n        \u003ccaption\u003eStock solution ratios by package size\u003c\/caption\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth scope=\"col\"\u003ePackage Size\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eWater Needed\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eConcentration\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eYield\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e2.5 lbs\u003c\/td\u003e\n            \u003ctd\u003e1 gallon\u003c\/td\u003e\n            \u003ctd\u003e2.5 lb\/gal\u003c\/td\u003e\n            \u003ctd\u003e1 gal concentrate\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e5 lbs\u003c\/td\u003e\n            \u003ctd\u003e2 gallons\u003c\/td\u003e\n            \u003ctd\u003e2.5 lb\/gal\u003c\/td\u003e\n            \u003ctd\u003e2 gal concentrate\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e10 lbs\u003c\/td\u003e\n            \u003ctd\u003e4 gallons\u003c\/td\u003e\n            \u003ctd\u003e2.5 lb\/gal\u003c\/td\u003e\n            \u003ctd\u003e4 gal concentrate\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003e25 lbs\u003c\/td\u003e\n            \u003ctd\u003e10 gallons\u003c\/td\u003e\n            \u003ctd\u003e2.5 lb\/gal\u003c\/td\u003e\n            \u003ctd\u003e10 gal concentrate\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 class=\"brown\"\u003eDosing by Water Type\u003c\/h3\u003e\n    \u003cdiv class=\"table-scroll\"\u003e\n      \u003ctable\u003e\n        \u003ccaption\u003eAdjust Cal-Mag based on starting water quality\u003c\/caption\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth scope=\"col\"\u003eWater Type\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eEC Reading\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eCal-Mag Rate\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eNotes\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eRO\/Distilled\u003c\/td\u003e\n            \u003ctd\u003e0.0\u003c\/td\u003e\n            \u003ctd\u003e100% (10 ml\/gal)\u003c\/td\u003e\n            \u003ctd\u003eAlways required\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eSoft Tap\u003c\/td\u003e\n            \u003ctd\u003e0.1–0.3\u003c\/td\u003e\n            \u003ctd\u003e75% (7.5 ml\/gal)\u003c\/td\u003e\n            \u003ctd\u003eMonitor monthly\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eMedium Tap\u003c\/td\u003e\n            \u003ctd\u003e0.3–0.5\u003c\/td\u003e\n            \u003ctd\u003e50% (5 ml\/gal)\u003c\/td\u003e\n            \u003ctd\u003eCheck water report\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eHard Tap\u003c\/td\u003e\n            \u003ctd\u003e\u0026gt;0.5\u003c\/td\u003e\n            \u003ctd\u003e25% or skip\u003c\/td\u003e\n            \u003ctd\u003eMay have enough Ca\/Mg\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 class=\"brown\"\u003eComplete 4-Part Feeding Schedule (ml\/gallon)\u003c\/h3\u003e\n    \u003cdiv class=\"table-scroll\"\u003e\n      \u003ctable\u003e\n        \u003ccaption\u003eFull system feeding rates by growth stage\u003c\/caption\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth scope=\"col\"\u003eGrowth Stage\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eCal-Mag Plus\u003cbr\u003e2-0-0\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eGrow Green\u003cbr\u003e4-2-6\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eMicro Green\u003cbr\u003e2-0-3\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eBlossom Green\u003cbr\u003e2-6-8\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eEC Target\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eSeedlings\u003c\/td\u003e\n            \u003ctd\u003e2.5\u003c\/td\u003e\n            \u003ctd\u003e1.25\u003c\/td\u003e\n            \u003ctd\u003e1.25\u003c\/td\u003e\n            \u003ctd\u003e1.25\u003c\/td\u003e\n            \u003ctd\u003e0.5–0.8\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eEarly Veg\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003e1.0–1.4\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eLate Veg\u003c\/td\u003e\n            \u003ctd\u003e7.5\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003e1.4–1.8\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eTransition\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e1.6–2.0\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eEarly Bloom\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e1.8–2.2\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003ePeak Bloom\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e0\u003c\/td\u003e\n            \u003ctd\u003e10\u003c\/td\u003e\n            \u003ctd\u003e20\u003c\/td\u003e\n            \u003ctd\u003e2.0–2.5\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eLate\/Flush\u003c\/td\u003e\n            \u003ctd\u003e5\u003c\/td\u003e\n            \u003ctd\u003e0\u003c\/td\u003e\n            \u003ctd\u003e7.5\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e1.5–2.0\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 class=\"brown\"\u003eDeficiency Correction Guide\u003c\/h3\u003e\n    \u003cdiv class=\"table-scroll\"\u003e\n      \u003ctable\u003e\n        \u003ccaption\u003eSymptom identification and correction approach\u003c\/caption\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth scope=\"col\"\u003eSymptom\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eDeficiency\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eSolution\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eBlossom-end rot\u003c\/td\u003e\n            \u003ctd\u003eCalcium delivery\u003c\/td\u003e\n            \u003ctd\u003eCheck pH (6.0–6.5), EC, irrigation consistency, and root health first; consider increasing to 15 ml\/gal if calcium supply is confirmed low\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eYellow between veins\u003c\/td\u003e\n            \u003ctd\u003eMagnesium\u003c\/td\u003e\n            \u003ctd\u003eFoliar spray 5 ml\/gal\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eBrown leaf tips or tip burn\u003c\/td\u003e\n            \u003ctd\u003ePossible calcium stress or excess salts\u003c\/td\u003e\n            \u003ctd\u003eCheck EC, pH, irrigation consistency, and root health first; target pH 6.0–6.5 for calcium uptake\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eNew growth yellowing\u003c\/td\u003e\n            \u003ctd\u003eIron\u003c\/td\u003e\n            \u003ctd\u003eLower pH to 5.8; EDTA iron availability decreases above 6.5\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- 5. HOW TO USE --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eHOW TO USE\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n\n    \u003ch3 class=\"brown\"\u003eHydroponic Systems (DWC, NFT, Drip, Aeroponic)\u003c\/h3\u003e\n    \u003col\u003e\n      \u003cli\u003ePrepare stock solution: dissolve 2.5 lbs Cal-Mag Plus per gallon of warm water. Stir until fully dissolved.\u003c\/li\u003e\n      \u003cli\u003eFill reservoir with fresh water and check EC of starting water.\u003c\/li\u003e\n      \u003cli\u003eAdd Cal-Mag Plus stock solution FIRST at the rate indicated for your water type (2.5–10 ml\/gal).\u003c\/li\u003e\n      \u003cli\u003eStir or circulate, then add remaining nutrients (Grow\/Micro\/Bloom) one at a time.\u003c\/li\u003e\n      \u003cli\u003eAdjust pH to 5.5–6.5. Check EC against target for current growth stage.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\n    \u003ch3 class=\"brown\"\u003eCoco Coir Growing\u003c\/h3\u003e\n    \u003col\u003e\n      \u003cli\u003ePre-buffer new coco: soak in Cal-Mag solution at 10 ml\/gal for 8–12 hours, then drain.\u003c\/li\u003e\n      \u003cli\u003eUse Cal-Mag every watering at 5–7.5 ml\/gal to help prevent calcium lockout from cation exchange.\u003c\/li\u003e\n      \u003cli\u003eAdd Cal-Mag to water first, followed by other nutrients.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\n    \u003ch3 class=\"brown\"\u003eFoliar Spray\u003c\/h3\u003e\n    \u003col\u003e\n      \u003cli\u003eMix 5 ml stock solution per gallon of water.\u003c\/li\u003e\n      \u003cli\u003eSpray in the early morning or late afternoon to reduce evaporation and leaf burn risk.\u003c\/li\u003e\n      \u003cli\u003eUse for rapid correction of visible deficiency symptoms. Stop foliar feeding 2 weeks before harvest.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\n    \u003c!-- Expert Tip --\u003e\n    \u003cdiv class=\"info-box\"\u003e\n      \u003ch3 class=\"teal\"\u003ePro Tip: Mixing Order Matters\u003c\/h3\u003e\n      \u003cp\u003eAlways add Cal-Mag to your reservoir first, then stir before adding other nutrients. Calcium can precipitate (form white solids) when it contacts concentrated sulfates or phosphates directly. Diluting Cal-Mag into the reservoir first substantially reduces this risk. For unfamiliar nutrient combinations, a jar test before reservoir mixing is always recommended.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- When to Use \/ When Not Ideal --\u003e\n    \u003ch3 class=\"brown\"\u003eWhen Cal-Mag Plus Is the Right Choice\u003c\/h3\u003e\n    \u003cul class=\"feature-list\"\u003e\n      \u003cli\u003eGrowing with RO, distilled, or soft water (EC below 0.3)\u003c\/li\u003e\n      \u003cli\u003eAny coco coir grow—coco binds calcium regardless of water quality\u003c\/li\u003e\n      \u003cli\u003eHigh-intensity indoor grows where rapid growth can expose calcium delivery limitations\u003c\/li\u003e\n      \u003cli\u003eTomatoes, peppers, and fruiting crops prone to blossom-end rot\u003c\/li\u003e\n      \u003cli\u003eAs part of the complete Greenway 4-part hydroponic system\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3 class=\"brown\"\u003eWhen to Consider Other Options\u003c\/h3\u003e\n    \u003cul class=\"feature-list\"\u003e\n      \u003cli\u003eHard water above 0.5 EC that already contains sufficient calcium and magnesium—test your water report first\u003c\/li\u003e\n      \u003cli\u003eSoil grows with adequate lime or dolomite—consider \u003ca href=\"\/products\/dolomite-lime\" target=\"_blank\" rel=\"noopener\"\u003eDolomite Lime\u003c\/a\u003e for long-term soil Ca\/Mg instead\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- 6. CAL-MAG PLUS CALCULATOR --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eCAL-MAG PLUS CALCULATOR\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cdiv class=\"gwb-calculator\" data-calc=\"calmag\"\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- 7. COMPARE WITH OTHER CAL-MAG PRODUCTS (optional) --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eCOMPARE WITH OTHER CAL-MAG PRODUCTS\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cdiv class=\"table-scroll\"\u003e\n      \u003ctable class=\"comparison-table\"\u003e\n        \u003ccaption\u003eCal-Mag Product Comparison\u003c\/caption\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth scope=\"col\"\u003eFeature\u003c\/th\u003e\n            \u003cth scope=\"col\" class=\"highlight\"\u003eCal-Mag Plus 2-0-0\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eLiquid Cal-Mag\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eCalMag Pro\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eForm\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003eDry Powder\u003c\/td\u003e\n            \u003ctd\u003eLiquid\u003c\/td\u003e\n            \u003ctd\u003eLiquid\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eCa-Mg-Fe\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003e3.2-1.2-0.1\u003c\/td\u003e\n            \u003ctd\u003e2-0.5-0.1\u003c\/td\u003e\n            \u003ctd\u003e3-1-0\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eShelf Life\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003eIndefinite\u003c\/td\u003e\n            \u003ctd\u003e2 years\u003c\/td\u003e\n            \u003ctd\u003e3 years\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eCost per gallon\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003e$0.08\u003c\/td\u003e\n            \u003ctd\u003e$0.25\u003c\/td\u003e\n            \u003ctd\u003e$0.20\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eShipping Weight\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003eMuch less\u003c\/td\u003e\n            \u003ctd\u003eHeavy\u003c\/td\u003e\n            \u003ctd\u003eHeavy\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eSystem Design\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003e4-Part Complete\u003c\/td\u003e\n            \u003ctd\u003eSupplement\u003c\/td\u003e\n            \u003ctd\u003eSupplement\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n    \u003cp\u003e\u003cem\u003eCompetitor specifications are approximate and subject to change. Verify current labels before purchasing.\u003c\/em\u003e\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- 8. SAFETY \u0026 HANDLING --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eSAFETY \u0026amp; HANDLING\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003ePersonal Protective Equipment (PPE)\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cul class=\"feature-list\"\u003e\n          \u003cli\u003eWear gloves and eye protection when handling powder\u003c\/li\u003e\n          \u003cli\u003eAvoid inhaling dust—use in well-ventilated areas or wear a dust mask\u003c\/li\u003e\n          \u003cli\u003eWash hands thoroughly after handling\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eStorage Guidelines\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cul class=\"feature-list\"\u003e\n          \u003cli\u003eStore in a cool, dry place in the original sealed container\u003c\/li\u003e\n          \u003cli\u003eHygroscopic—absorbs moisture from air. Reseal tightly after each use\u003c\/li\u003e\n          \u003cli\u003eKeep out of direct sunlight and away from heat sources\u003c\/li\u003e\n          \u003cli\u003eKeep away from children and pets\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eApplication Precautions\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cul class=\"feature-list\"\u003e\n          \u003cli\u003eAlways add Cal-Mag to water FIRST before other nutrients to help prevent precipitation\u003c\/li\u003e\n          \u003cli\u003eNever mix concentrated Cal-Mag directly with concentrated sulfate or phosphate fertilizers\u003c\/li\u003e\n          \u003cli\u003eDissolve in warm water for fastest results—do not use boiling water\u003c\/li\u003e\n          \u003cli\u003eAvoid contact with metal surfaces—rinse equipment after use\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eFirst Aid\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cul class=\"feature-list\"\u003e\n          \u003cli\u003e\n\u003cstrong\u003eEye contact:\u003c\/strong\u003e Flush with clean water for 15 minutes. Seek medical attention if irritation persists\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eSkin contact:\u003c\/strong\u003e Wash affected area with soap and water\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eIngestion:\u003c\/strong\u003e Do not induce vomiting. Contact Poison Control (1-800-222-1222) or seek medical attention\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eInhalation:\u003c\/strong\u003e Move to fresh air. Seek medical attention if symptoms persist\u003c\/li\u003e\n        \u003c\/ul\u003e\n        \u003cp\u003eRefer to the Safety Data Sheet (SDS) in the Documents section for complete safety information.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdiv id=\"gwb-newsletter-mid\"\u003e\u003c\/div\u003e\n\n\u003c!-- 9. COMPLETE YOUR SYSTEM --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eCOMPLETE YOUR SYSTEM\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cp\u003eCal-Mag Plus works best as part of our complete 4-part hydroponic nutrient system. Each component is designed to work together for balanced nutrition from seed to harvest.\u003c\/p\u003e\n    \u003cdiv class=\"pairs-grid\"\u003e\n      \u003ca href=\"\/products\/grow-green-4-2-6-concentrate\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003cspan class=\"pair-badge\"\u003eEssential\u003c\/span\u003e\n        \u003ch3\u003eGrow Green 4-2-6\u003c\/h3\u003e\n        \u003cp\u003eVegetative growth formula with balanced NPK for lush, healthy foliage during veg stage.\u003c\/p\u003e\n      \u003c\/a\u003e\n      \u003ca href=\"\/products\/blossom-green-fertilizer-2-6-8\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003cspan class=\"pair-badge\"\u003eEssential\u003c\/span\u003e\n        \u003ch3\u003eBlossom Green 2-6-8\u003c\/h3\u003e\n        \u003cp\u003eFlowering formula with high phosphorus and potassium for abundant blooms and fruit development.\u003c\/p\u003e\n      \u003c\/a\u003e\n      \u003ca href=\"\/products\/micro-green-2-0-3\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003cspan class=\"pair-badge\"\u003eEssential\u003c\/span\u003e\n        \u003ch3\u003eMicro Green 2-0-3\u003c\/h3\u003e\n        \u003cp\u003eComplete micronutrient package with chelated trace elements for enzyme function and plant health.\u003c\/p\u003e\n      \u003c\/a\u003e\n      \u003ca href=\"\/products\/hydroponics-bundle\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003cspan class=\"pair-badge\"\u003eBest Value\u003c\/span\u003e\n        \u003ch3\u003e4-Part Hydroponic Bundle\u003c\/h3\u003e\n        \u003cp\u003eGet all four components together and save. Everything you need for a complete hydroponic feeding program.\u003c\/p\u003e\n      \u003c\/a\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- 10. FREQUENTLY ASKED QUESTIONS --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eFREQUENTLY ASKED QUESTIONS\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eWhy choose powder over liquid Cal-Mag?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003ePowder costs significantly less per dose, ships with much less weight, never expires when stored dry, takes less storage space, and lets you adjust concentration based on your water quality. You pay for nutrients, not water.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eDo I need Cal-Mag if using tap water?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eIt depends on your water hardness. Test your water EC: below 0.3 EC needs Cal-Mag, while hard water above 0.5 EC may already contain enough calcium and magnesium. Get a water report from your utility for exact levels. For more on nutrient management, see our \u003ca href=\"\/blogs\/gardening-articles\/hydroponic-nutrient-guide\" target=\"_blank\" rel=\"noopener\"\u003eComplete Hydroponic Nutrient Guide\u003c\/a\u003e.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eCan I use Cal-Mag Plus as a foliar spray?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eYes. Mix 5 ml of stock solution per gallon and spray in the early morning or late afternoon to reduce evaporation and leaf burn risk. Foliar feeding provides rapid correction of visible deficiencies. Avoid spraying during peak midday heat and stop foliar applications 2 weeks before harvest.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eIs Cal-Mag required for coco coir?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eStrongly recommended. Coco coir's cation exchange sites naturally bind calcium and release sodium in its place, making deficiency very likely even with calcium-rich tap water. Use Cal-Mag every watering at 5–7.5 ml\/gal and pre-buffer new coco with 10 ml\/gal solution. Learn more in our \u003ca href=\"\/blogs\/gardening-articles\/coco-coir-growing-tips\" target=\"_blank\" rel=\"noopener\"\u003eCoco Coir Growing Tips \u0026amp; Best Practices\u003c\/a\u003e article.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eHow do I know if my plants need more Cal-Mag?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eCalcium deficiency shows as blossom-end rot, brown spots, and tip burn. Magnesium deficiency causes yellowing between leaf veins on older leaves. Iron deficiency appears as yellowing of new growth. Prevention is always easier than correction. For help identifying symptoms, see \u003ca href=\"\/blogs\/gardening-articles\/understanding-calcium-magnesium-deficiencies\" target=\"_blank\" rel=\"noopener\"\u003eUnderstanding Calcium \u0026amp; Magnesium Deficiencies\u003c\/a\u003e.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eWhy must Cal-Mag be added first before other nutrients?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eCalcium can precipitate (form white insoluble solids) when mixed directly with concentrated sulfates or phosphates. Adding Cal-Mag to water first dilutes it sufficiently so that when you add subsequent nutrients, concentrations are much less likely to reach precipitation thresholds. For unfamiliar combinations, a jar test before mixing in the main reservoir is always a good practice.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eHow long does the stock solution last?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eA properly stored stock solution in a sealed container lasts 2–4 weeks. If you see any cloudiness or precipitate forming, discard and make a fresh batch. The dry powder itself has an indefinite shelf life when kept sealed and dry.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- 11. GROW WITH CONFIDENCE --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eGROW WITH CONFIDENCE\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eProduct Quality\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cul class=\"feature-list\"\u003e\n          \u003cli\u003eThird-party lab tested for purity and heavy metal content, with results consistently well below required limits\u003c\/li\u003e\n          \u003cli\u003eCDFA registered—meets California's strict agricultural standards\u003c\/li\u003e\n          \u003cli\u003eFamily-owned and operated for 35+ years, manufacturing in Madera, California since 1989\u003c\/li\u003e\n          \u003cli\u003eWidely used by hydroponic growers across the US and internationally\u003c\/li\u003e\n          \u003cli\u003eLong shelf life when stored sealed, dry, and free from contamination\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003e90-Day Satisfaction Guarantee\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eNot completely satisfied? Return within 90 days for a full refund. We stand behind every product we sell.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eSustainability\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cul class=\"feature-list\"\u003e\n          \u003cli\u003eConcentrated powder significantly reduces shipping weight compared to liquids\u003c\/li\u003e\n          \u003cli\u003eLess packaging waste per nutrient delivered\u003c\/li\u003e\n          \u003cli\u003eNo water shipped—mix fresh when you need it\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eExpert Support\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eOur team of horticulture experts is available Monday–Friday to help you get the best results. Email us at \u003ca href=\"mailto:questions@greenwaybiotech.com\"\u003equestions@greenwaybiotech.com\u003c\/a\u003e for personalized growing advice.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- 12. DOCUMENTS --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eDOCUMENTS\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cul class=\"doc-links\"\u003e\n      \u003cli\u003e📄 \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/files\/Cal_Mag_Plus_2-0-0_SDS.pdf?v=1775623165\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSafety Data Sheet (SDS) (PDF)\u003c\/a\u003e\n\u003c\/li\u003e\n      \u003cli\u003e📋 \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/files\/Cal_Mag_2-0-0_Plus_Iron_Approved_Label_09102018_PMB.pdf?v=1775605005\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eProduct Label (PDF)\u003c\/a\u003e\n\u003c\/li\u003e\n      \u003cli\u003e🔬 \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/files\/Cal_Mag_Plus_Heavy_Metal_Analysis.pdf?v=1775605006\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eHeavy Metal Analysis — A\u0026amp;L Western Agricultural Laboratories (PDF)\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- 13. DISCOVER MORE --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eDISCOVER MORE\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cul class=\"discover-list\"\u003e\n      \u003cli\u003e\u003ca href=\"\/blogs\/gardening-articles\/understanding-calcium-magnesium-deficiencies\" target=\"_blank\" rel=\"noopener\"\u003eUnderstanding Calcium \u0026amp; Magnesium Deficiencies — Identify and correct Ca\/Mg problems fast\u003c\/a\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003ca href=\"\/blogs\/gardening-articles\/hydroponic-nutrient-guide\" target=\"_blank\" rel=\"noopener\"\u003eComplete Hydroponic Nutrient Guide — Everything you need to know about feeding hydroponics\u003c\/a\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003ca href=\"\/blogs\/gardening-articles\/coco-coir-growing-tips\" target=\"_blank\" rel=\"noopener\"\u003eCoco Coir Growing Tips \u0026amp; Best Practices — Master the art of growing in coco\u003c\/a\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003ca href=\"\/blogs\/gardening-articles\/4-part-hydroponic-system\" target=\"_blank\" rel=\"noopener\"\u003eHow to Use the 4-Part Hydroponic System — Complete feeding guide from seed to harvest\u003c\/a\u003e\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- 14. HAVE QUESTIONS? (LAST dropdown — email only) --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eHAVE QUESTIONS?\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cp\u003e📧 \u003ca href=\"mailto:questions@greenwaybiotech.com\"\u003equestions@greenwaybiotech.com\u003c\/a\u003e\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Greenway Biotech, Inc.","offers":[{"title":"2.5 Pounds (Makes 1 Gallon)","offer_id":47862885089498,"sku":"0701748874266","price":33.99,"currency_code":"USD","in_stock":true},{"title":"5 Pounds (Makes 2 Gallons)","offer_id":47862885122266,"sku":"0701748874273","price":55.99,"currency_code":"USD","in_stock":true},{"title":"10 Pounds (Makes 4 Gallons)","offer_id":47862885155034,"sku":"018227121439","price":97.99,"currency_code":"USD","in_stock":true},{"title":"25 Pounds (Makes 10 Gallons)","offer_id":47862885187802,"sku":"018227121446","price":209.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/6244\/1063\/files\/CalMag.jpg?v=1778681114","url":"https:\/\/midwestgrowco.com\/products\/cal-mag-plus-2-0-0-concentrate","provider":"Midwest Grow LLC","version":"1.0","type":"link"}