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pH/EC

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Regular price $22.99
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General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial. pH UP is a base solution formulated using potassium hydroxide and potassium carbonate. pH Down's acid ...
Regular price $8.59
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Drops- General Hydroponics 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 tes...
Regular price $2.69
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Bluelab® 7.0 Calibration Solution- 18ml Bluelab calibration solution pH 7 18ml sachet.
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Bluelab® 4.0 Calibration Solution- 18ml Bluelab calibration solution pH 4 18ml sachet.
Regular price $35.99
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The acid formulation uses phosphoric acid to lower the pH to the proper level. Available in store only.
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Regular price $81.99
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Say goodbye to nutrient lockout and hello to heavier harvests. Our scientists engineered  pH-Down with Phosphoric Acid, so you can easily achieve the ideal pH levels for optimal nutrient absorption...