pH Up

It’s formulated with potassium hydroxide and potassium carbonate.

After. Mix nutrients first, then use pH Up to fine-tune the solution.

Many hydro programs run around pH 5.5–6.5. Follow your crop and system guidance.

Start small — add a little, stir, test, and repeat. Required volume depends on your water quality and recipe strength.

Under proper storage, expect full potency for about 2 years. Use opened products within one growing season.

General Hydroponics products are warranted to conform to label specifications at the time of purchase and for 1 year from that day. Misuse, mishandling, or storage outside recommended conditions voids warranty.

Answer: pH Down is formulated with food-grade phosphoric acid to safely and reliably lower the pH of your nutrient solution. pH Up is formulated with potassium hydroxide and potassium carbonate to raise the pH of the solution when it runs too low.

There is no single set dosage because the required volume varies depending on your starting water quality, source alkalinity, and specific nutrient recipe strength. The best practice is to add a very small amount at a time, stir or circulate the solution thoroughly, test the pH, and repeat until you reach your target setpoint.

Unopened bottles stored in a cool, dry place out of direct sunlight and away from extreme temperatures maintain full potency for approximately 2 years. Once opened, it is recommended to use the product within one growing season for the best and most consistent results. General Hydroponics warrants the products to conform to label specifications for 1 year from the date of purchase, though misuse, improper mixing, or incorrect storage voids this warranty.