the lady who sold me the oscar and the other lil chiclid told me to run the tank for about 24 hr using the Stress Zyme and Aqua Safe, that's what I did, I'm not really sure if my GH is perfect enough, but its about on 60 on the test strip I bought and the KH is about 120 and my PH is on 7.0 NO2 and 3 is on 0, I'm hopefully its good enough or atleast near perfect. I'm hoping the lady that explained everything about the tank and the number on the GH, KH, pH, and also the NO2 an 3 is correct.But so far so good my babies are chasing each other as a playful thing hopefully, but my oscar seem to be looking straight down as if he's looking for something that's what it seem to be I think. Oh, another question just in case if the GH, KH, and pH aren't at the number where its suppose to be, how are you suppose to get to the number where it should be? Do I add more Stress Zyme or the Aqua Clean or is their another way to fix it?