Stable phosphoric acid formula: Ensures reliable and consistent pH adjustments
Liquid application: Allows easy mixing and use directly from hose or tap
Supports optimal plant growth: Maintains ideal water chemistry for healthy plants
Essential for lettuce grow kits: Designed specifically for use with pH test kits
Summarized by Shop
Condition and pH balance your water with ease.
Our pH Down solution contains stable phosphoric acid, allowing you to quickly adjust water from your hose or tap to its ideal pH level. Designed to support consistent water quality, it’s an essential tool for anyone using the Lettuce Grow pH Test Kit.
Application Method
Liquid
Active Ingredient
Phosphoric acid
Intended Use
Water pH adjustment
Compatibility
Tap and hose water
Summarized by Shop
4.7
32 ratings
5
4
3
2
1
Easy to use.
Love this product. Vegas water needs around 6 with a fill up and 9 with a start off. Would love a larger size in the future.
N
Nicole · 9 days ago
Plant RX
Our local tap water is so out of balance with chemicals. This product helps my plants have a fighting chance at survival.
J
Jeanette · August 5, 2026
Love how long this product has lasted, I have had my grow stand about 6 months. I have had to use this product regularly due to city water. So glad that a little goes a long way.