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pH Testers & Adjusters

Keeping pH levels correct is one of the most important aspects of indoor gardening, and with pH testers and adjusters like pH meters and up and down, pH control is made simple. Unlike gardening outdoors, where rainwater and soil provide ample buffers and corrects to input pH, indoorgardens must correct for pH variations in both source water and nutrient feeds. Tap water can vary in its pH because different cities and municipalities add different chemicals and buffers to keep pH above 7. Nutrients usually have very acidic or alkaline values thanks to the mineral salts or concentrated organic supplements. Different species of plants vary in their pH requirements, but a common rule of thumb for indoor growers is 5.5-6.5 for soil, and 5.8-6.3 for hydroponics. HTG Supply carries top brands like General Hydroponics, Earth Juice, Advanced Nutrients, and Nectar for the God, all with excellent pH Ups and Downs.

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Product Filters
Weight Limit
Wattage
Voltage
System Type
Style
Speed Control Compatible
Spectrum Type
Fitting Size
Flange Size
Reflector Size
Size
Socket Type
Shape
Reversible
Reflector Type
Probe Type
Portability
Planting Sites
Output Control
Outlets
Number of Lamps
Module Capacity
Material
Light Type
Light Source
Lamp Drive Frequency
HID Type
HID Bulb Type
Fitting Type
Component Type
Chip Type
Base Type
Ballast Component Type
Application Type
Application Type
Growing Method
GPH
Fixture Configuration
Fan CFM
Configuration
Color Temp. (Kelvin)
CFM
Bulb Length
Built-In Socket
FoxFarm pH up 1 quart
FoxFarm Cultivation Nation pH Up - 1 Quart
$16.93
FoxFarm pH Down Quart
Foxfarm Cultivation Nation pH Down - 1 Quart
$16.93
Fertroller
CropKing Fertroller
$3,740.50
Hydra Pac Calibration Solution
HydraPAC Calibration Solution, 2 Ounce
$13.95
Hanna 1382 250Ml
Hanna 1382 TDS Calibration Solution
$1.04$12.00
Gh Phdown
General Hydroponics pH Down
$7.64
Gh Phup
General Hydroponics pH Up
$7.64
Hanna 1413 Calibration Solution - 20 ml 25 pk
Hanna 1413 Calibration Solution
$1.04$14.50
Hanna Cleaning Solution2
Hanna Cleaning Solution
$1.28
Bluelab Ec Solution
Bluelab EC Solution
$10.50$18.90
Advanced Nutrients Ph Up
Advanced Nutrients pH UP
$10.64$213.00
Advanced Nutrients Ph Down
Advanced Nutrients pH Down
$17.82$213.00

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