I do have a question about controlling the PH though....I bought a PH control kit, with PH up, PH down, and a PH tester...how exactly do I use this. Obviously the PH is wrong, but am I adding the PH up to the watering and then test the runoff, or to just the perlite and stir it around (That doesn't really make sense to me)...should be here in a day or two and want to make sure I'm doing it right.