If my water parameters were all off how else would I adjust them? I have only been using flourish in the tank, so I doubt it is a nutrient overload. The tank is heavily planted with fast growing plants, cabomba, ambulia, hygros, rotala, pennywort, and others. I am running 2 coke bottle reactors with 160 watts from 2 shoplights. I will be receiving a 260 watt aqualight this week. I never got a test kit because from what I have read in the forum they are hard to read or do not work all the time.