Hey everyone, trying to get use to this afternoon shift i was transfered to. Anyway I am still unable to lower my PH, I believe its my grow media. I used 5G gravel, wont do that again. Tryin to save money screwed me in the long run. My PH is running in the 9 to 10 range. Fish dont seem to mind, plants are growing slow and are small. tried just about everything I could think of to lower it but no luck. Also tried everything that some of you suggested still low PH. My next step is to tear down the whole thing and go back to growing in dirt. I had much better plants in dirt and a whole bunch cheaper, this is just too much work and money for the problems I am having.