Grow Room Meters & Testers | pH, EC, CO2 & More

Active Air CO2 System with Timer, 0.2-2 cu ft per hour

Active Air CO2 System with Timer, 0.2-2 cu ft per hour

Regular price From $123.59 USD

Regular price Sale price From $123.59 USD
pHep Tester

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pHep Tester

Regular price $55.99 USD

Regular price ~~$55.99 USD~~ Sale price $55.99 USD

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Active Air 2-Way Moisture/pH Meter

Active Air 2-Way Moisture/pH Meter

Regular price $11.84 USD

Regular price Sale price $11.84 USD
Active Air 3-Way Meter

Active Air 3-Way Meter

Regular price $13.09 USD

Regular price Sale price $13.09 USD
Bluelab Original Truncheon® Nutrient Meter

Bluelab Original Truncheon® Nutrient Meter

Regular price $149.00 USD

Regular price Sale price $149.00 USD
Bluelab® Conductivity Pen

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Bluelab® Conductivity Pen

Regular price $99.00 USD

Regular price Sale price $99.00 USD

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Bluelab® pH Pen

Bluelab® pH Pen

Regular price $129.00 USD

Regular price Sale price $129.00 USD
Bluelab Multimedia pH Meter (Leap Probe Included)

Bluelab Multimedia pH Meter (Leap Probe Included)

Regular price $295.74 USD

Regular price Sale price $295.74 USD
Bluelab pH Controller

Bluelab pH Controller

Regular price $740.94 USD

Regular price Sale price $740.94 USD
Bluelab Connect Stick

Bluelab Connect Stick

Regular price $168.54 USD

Regular price Sale price $168.54 USD
GH pH Test Kit 1 oz

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GH pH Test Kit 1 oz

Regular price $6.99 USD

Regular price Sale price $6.99 USD

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GH pH Control Kit

GH pH Control Kit

Regular price $21.25 USD

Regular price Sale price $21.25 USD
Growee pH Combo Doser

Growee pH Combo Doser

Regular price $695.00 USD

Regular price Sale price $695.00 USD
Bluelab® pH Controller

Bluelab® pH Controller

Regular price $399.00 USD

Regular price Sale price $399.00 USD
AC Infinity pH Meter Kit, pH Pen Tester

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AC Infinity pH Meter Kit, pH Pen Tester

Regular price $59.99 USD

Regular price Sale price $59.99 USD

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HM Digital Pen style TDS/Temp meter with case

HM Digital Pen style TDS/Temp meter with case

Regular price $19.95 USD

Regular price Sale price $19.95 USD

Let customers speak for us

from 98 reviews

Received my package surprisingly fast! I got exactly what i ordered

Christopher

05/15/2026

Grotek Gro-Silic, 250 ml

Fair price

Received my order quickly and was the cheaper price I’ve found. Will do business again soon

Dennis Cudal

04/29/2026

Xtreme Gardening Versity 1lb

Great product and quick shipping

Item was received quickly and is perfect for helping our garden. Thanks!

Val Lewis

04/22/2026

PBH Rice Hulls (organic)

Excellent service excellent

Excellent service excellent excellent

Tim Harris

04/05/2026

Midwest Grow LLC

Best Earthworm Castings Hands Down!

I’ve been growing for ten years so I like to think I know a little bit about what I’m doing. I’ve tried many different brands of earthworm castings, and Ridgeline’s is hands down the best of the bunch. What I like about it is that it’s moist and fresh without being sloppy wet and heavy. I’ve never gotten bugs from it, and no weeds have ever grown out of it— except the weeds I’m trying to grow in it! Anyway, buy it. It’s good stuff. Your plants will love it!

Joseph Duncan

04/02/2026

Ridgeline Organics Premium Earthworm Castings

Love it!

N.D.

03/31/2026

Advanced Nutrients pH Perfect Trio (Grow,Micro,& Bloom)

Great product

Great company with a great product. Will use again

Ben Mcintosh

03/30/2026

Ridgeline Organics Endo-Go Premium Mycorrhizal Fungi

Roots Organics Terp Tea Bloom Boost

Ernest Fulcher

03/28/2026

Excellent company

The customer service is amazing, and the quality of the earth worm casting top notch def. Will purchase from again

03/24/2026

The package arrived promptly, products as described.

Micheal

02/23/2026

Gaia Green Organics All Purpose, 500 g Pouch

Gaia Green Power Bloom

Bubble Magic 5 Gallon Washing Machine

Guy Drew

02/20/2026

Washer worked just like it was intended

First id like to say this came within 7 days just in time for the ice days so that was great and it di exactly what it is designed to do.

Bobby Allen

02/14/2026

Bubble Magic 5 Gallon 220 Micron Washing Bag w/ Zipper

Awesome

Really great soil it pretty much takes all the work out of it with feeding wise besides the watering whenever it needs I highly recommend this soil

02/13/2026

Gaia Green Organics Living Soil, 1.5 cu ft bag

This light is much more inexpensive than other grow lights and it's an LED so it doesn't use a lot of electricity. I got a second one to double my capacity for house plants and to have the light coming in from both sides. My house plants have made great improvements with these lights and the cold dark winter.

Laurel

01/22/2026

Agrobrite Standing LED Plant Lamp, 14W

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Active Air CO2 System with Timer, 0.2-2 cu ft per hour

Active Air CO2 System with Timer, 0.2-2 cu ft per hour

pHep Tester

pHep Tester

Active Air 2-Way Moisture/pH Meter

Active Air 2-Way Moisture/pH Meter

Active Air 3-Way Meter

Active Air 3-Way Meter

Bluelab Original Truncheon® Nutrient Meter

Bluelab Original Truncheon® Nutrient Meter

Bluelab® Conductivity Pen

Bluelab® Conductivity Pen

Bluelab® pH Pen

Bluelab® pH Pen

Bluelab Multimedia pH Meter (Leap Probe Included)

Bluelab Multimedia pH Meter (Leap Probe Included)

Bluelab pH Controller

Bluelab pH Controller

Bluelab Connect Stick

Bluelab Connect Stick

GH pH Test Kit 1 oz

GH pH Test Kit 1 oz

GH pH Control Kit

GH pH Control Kit

Growee pH Combo Doser

Growee pH Combo Doser

Bluelab® pH Controller

Bluelab® pH Controller

AC Infinity pH Meter Kit, pH Pen Tester

AC Infinity pH Meter Kit, pH Pen Tester

HM Digital Pen style TDS/Temp meter with case

HM Digital Pen style TDS/Temp meter with case

Let customers speak for us