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We ship to Puerto Rico, all 50 U.S. states, and the U.S Virgin Islands.
We ship to Puerto Rico, all 50 U.S. states, and the U.S Virgin Islands.

Calibration Solutions

General Hydroponics pH Test Indicator

General Hydroponics
Original price $8.00 - Original price $15.00
Original price
$8.00 - $15.00
$8.00 - $15.00
Current price $8.00

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 ob...

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Original price $8.00 - Original price $15.00
Original price
$8.00 - $15.00
$8.00 - $15.00
Current price $8.00

General Hydroponics pH Down

General Hydroponics
Original price $12.00 - Original price $30.00
Original price
$12.00 - $30.00
$12.00 - $30.00
Current price $12.00

*Uses food-grade phosphoric acid to lower the pH to the proper level. To maximize plant growth, the pH content of your nutrients should be slightly...

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Original price $12.00 - Original price $30.00
Original price
$12.00 - $30.00
$12.00 - $30.00
Current price $12.00
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General Hydroponics pH Up

General Hydroponics
Original price $12.00 - Original price $30.00
Original price
$12.00 - $30.00
$12.00 - $30.00
Current price $12.00

*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 ...

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Original price $12.00 - Original price $30.00
Original price
$12.00 - $30.00
$12.00 - $30.00
Current price $12.00

General Hydroponics pH Control Kit

General Hydroponics
Original price $20.00 - Original price $20.00
Original price
$20.00
$20.00 - $20.00
Current price $20.00

General Hydroponics pH Control Kit contains 8 oz of GH pH Up, 8 oz GH pH Down, 1 oz of the GH pH Test Indicator and a test vial. GH pH Up - Add a ...

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Original price $20.00 - Original price $20.00
Original price
$20.00
$20.00 - $20.00
Current price $20.00