General Hydroponics pH Up & pH Down Liquids — Stabilize Nutrient pH in Hydroponics, 1 qt Bottles

Stabilize nutrient pH for healthier hydroponic growth

General Hydroponics pH Up and pH Down liquids are designed to help you keep your nutrient solution within the optimal pH range. In hydroponics, pH influences how readily plants access the 16 essential elements needed for robust growth. When pH drifts, some macroelements (like nitrogen, phosphorus, and potassium) may become less available, while certain micronutrients can accumulate to undesired levels. With controlled adjustments, you can support steady uptake and reduce guesswork in feed schedules.

What you get

• pH Up: a base solution formulated with potassium hydroxide and potassium carbonate
• pH Down: an acid formulation that uses phosphoric acid
• Convenient 1 qt bottles for easy, in-tank adjustments
• Designed to work with typical hydroponic nutrient mixes (not a replacement for proper calibration)

How to use

Begin with a small amount and test after a short interval. A common starting point is 1 milliliter per gallon. After adding, wait 15 to 30 minutes and re-test the solution to determine if another small increment is needed. In many setups, 1–2 ml per gallon is sufficient, though you may require more with very hard water.

1. Measure the current pH of your reservoir.
2. Add 1 ml per gallon of pH Up or pH Down as needed.
3. Wait 15–30 minutes and re-check the pH level.
4. Adjust in small increments until you approach the target range (typically around 5.5–6.5 for many crops).

Tips for best results

• Always test after a short settling period before making further adjustments.
• Hard water can shift the amount needed; plan for incremental increases if your tap water is mineral-rich.
• Use pH adjustments as part of a broader monitoring routine, alongside EC/ppm and temperature checks.
• Keep containers sealed when not in use and store in a cool, shaded place to preserve quality.

Why choose General Hydroponics

• Trusted brand with formulations designed for hydroponic systems
• Clear guidance on dosing and timing to support consistency in nutrient management
• Versatile in-tank solutions that pair with a wide range of nutrient programs