I have fish already in it it's a 75 gallon running for about a week and a half I used the api master kit anyway my ammonia is 0 to 0.25 nitrate 40 to 80 ppm PH 7.4 to .76 and nitrite 2.0 to 5.0 ppm sure my tank has a large bio load but I've started doing water changes every other day about about...