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pH Replacement Electrode for Combo & pH Meter
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General Hydroponics pH Control Kit

General Hydroponics pH Control Kit
$15.48
General Hydroponicså¬ pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial.
GH pH Test Kit 1 oz

GH pH Test Kit 1 oz
$8.20
General Hydroponicså¬ pH Test Kits make pH testing easy. Simply fill a test-tube halfway with nutrient, add a few drops of pH Test Indicator and observe the coloration of the liquid in the test vial. Many experienced growers prefer our pH Test Kit to expensive electronic meters because of its reliability and ease of use, which are important fact...
General Hydroponics pH Down Liquid Quart

General Hydroponics pH Down Liquid Quart
$9.68
The Acid formulation uses food grade Phosphoric acid to lower the pH to the proper level.
General Hydroponics pH Up Liquid Quart

General Hydroponics pH Up Liquid Quart
$9.68
This Base solution is formulated using Potassium Hydroxide and Potassium Carbonate. Add a little at a time when your nutrient pH is too low in order to raise the pH to the proper level.This powder based formula is made to raise the pH in a reservoir. Lightweight in comparison to liquids.
General Hydroponics pH Down Liquid Gallon

General Hydroponics pH Down Liquid Gallon
$24.21
The Acid formulation uses food grade Phosphoric acid to lower the pH to the proper level.
HM Digital pH 80 Meter

HM Digital pH 80 Meter
$56.66
Resolution: pH 0.1 pH, 0.00 - 14.0 pH. Accurate to å±0.1 pH. Hold button and auto shut-off. Automatic Calibration: Auto-ranging to 4, 7 or 10 pH. Very reliable and long lasting. Low battery indicator. Clear cap to notice moisture (or lack of) on probe. Glass encased reference electrode - helps retain moisture. Batteries included.
pH Down - 1 Gallon

pH Down - 1 Gallon
$44.99
When your pH is too high, you need pH Down. You must know that a solution is acidic when it has a pH in the range of 0 to 6.9 and alkaline when it has a pH in the range of 7.1 to 14. Pure water or deionized water is neutral at pH 7. The ideal pH for most hydroponic gardening applications is between 5.8 and 6.5, with few exceptions. HOW TO USE ...
pH 7.0 Calibration Sol 500 ml

pH 7.0 Calibration Sol 500 ml
$9.89
Calibration and conductivity standard solutions... a must in every grower's toolbox. The Bluelab calibration and conductivity standard solutions are essential for use with all Bluelab products for the calibration of pH and testing the cleanliness of the Bluelab Conductivity/Temperature probe. Bluelab solutions are manufactured specifically for...
pH 4.0 Calibration Sol 500ml

pH 4.0 Calibration Sol 500ml
$9.89
Calibration and conductivity standard solutions... a must in every grower's toolbox. The Bluelab calibration and conductivity standard solutions are essential for use with all Bluelab products for the calibration of pH and testing the cleanliness of the Bluelab Conductivity/Temperature probe. Bluelab solutions are manufactured specifically for...
General Hydroponics pH Up Liquid Gallon

General Hydroponics pH Up Liquid Gallon
$24.21
This Base solution is formulated using Potassium Hydroxide and Potassium Carbonate. Add a little at a time when your nutrient pH is too low in order to raise the pH to the proper level.This powder based formula is made to raise the pH in a reservoir. Lightweight in comparison to liquids.
pH Down - 1 Quart

pH Down - 1 Quart
$19.99
When your pH is too high, you need pH Down. You must know that a solution is acidic when it has a pH in the range of 0 to 6.9 and alkaline when it has a pH in the range of 7.1 to 14. Pure water or deionized water is neutral at pH 7. The ideal pH for most hydroponic gardening applications is between 5.8 and 6.5, with few exceptions. HOW TO USE ...
pH Up - 500 mL

pH Up - 500 mL
$9.99
When your pH is too low, you need pH Up. You must know that a solution is acidic when it has a pH in the range of 0 to 6.9 and alkaline when it has a pH in the range of 7.1 to 14. Pure water or deionized water is neutral at pH 7. The ideal pH for most hydroponic gardening applications is between 5.8 and 6.5, with few exceptions. HOW TO USE Sta...