Food-grade phosphoric acid formula ensures safe and effective pH lowering
Maintains optimal pH range (5.5–6.5) for most crops
Compatible with various hydroponic media including rock wool and gravel
Easy-to-use liquid application for precise dosing
Prevents pH instability caused by poor water quality or rapid nutrient absorption
Summarized by Shop
Perfect professional hydroponic mild acid solution for lowering the pH of water for your microgreens. 1 Quart Bottle. Instructions for use included on label. Made by General Hydroponics. See also pH Up.
pH DOWN by General Hydroponics - 1 Quart - Lower pH of Water
pH DOWN by general hydroponics is a mild acid solution that is perfect for
Formulation
Liquid
Active Ingredient
Food-grade phosphoric acid
Available Sizes
1 quart, 1 gallon, 8 oz
Application
pH adjustment for hydroponic nutrient solutions
Brand
General Hydroponics
Summarized by Shop
5.0
5 ratings
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1
Love it
J
Joshua · February 22, 2026
Easy Ph down
Fast and easy Ph down for hydroponics. Microgreens and lettuce responded well. Simple and quality ingredients. I use this for Microgreen 10x20 trays and my circulating hydroponics lettuce system. Jim M.
J
James · December 21, 2023
Great product
This works exceptionally with very little and it provides consistent results once you determine how little to use for your water container size