Sulfuric acid. Go to the car parts store and get battery acid. It is stong so be carefull. A little goes a long way. That is what the big comercial growers use in hydro for huge rez's. I got my bro to use it and now ph doesn't flux on him as bad.

Don't use pool stuff it has other stuff in it. Killed all my bro's stuff.
LOC NAR on probation Reviewed by LOC NAR on probation on . high PH Ok, I just did a PH reading on my hydro set up and found the PH to be 7.6. What can I use to bring it down? vinagar? lemon juice? I dont have the $$$ to go get ph reducer. and the hydro store is closed? is there another way? thanks:( Rating: 5