I had previously been using lemon juice to control Ph, but I recently got a bottle of Ph Down made by Green Air Products. Its made from a phosphoric acid base, and has an N-P-K rating of 0-9-0. About 1/3 of a tsp brings my well water from 7.2 to 6.5.

What I am wondering is, should I adjust my nutes down a bit when using it, since it has a phosphorus component?
Tokudai Reviewed by Tokudai on . Ph Down = Food? I had previously been using lemon juice to control Ph, but I recently got a bottle of Ph Down made by Green Air Products. Its made from a phosphoric acid base, and has an N-P-K rating of 0-9-0. About 1/3 of a tsp brings my well water from 7.2 to 6.5. What I am wondering is, should I adjust my nutes down a bit when using it, since it has a phosphorus component? Rating: 5