I don't know if this stuff really works, but at least it will bring your ph level down if your water needs that kind of treatment. I bought a new product at "Pet World" called, "Liquid Acid Buffer" It claims on the cover of the bottle it converts Alkalinity into CO2 @_@ If it's ok for fish and plants I would hope it's ok for my garden to bring down the ph level. It goes a long way for 12 dollars .