coffee grinds are supposed to work. I've never used them before so i wouldn't know how much to put in...anyone else know?
chrisdl805 Reviewed by chrisdl805 on . How to lower PH? how do i lower my ph. its at 7 right now and im in a soil grow? any homemade methods? i kno about ph up and down at hydro shops but im not there at the moment.....:rastasmoke: Rating: 5