Okay so here's what happens... after i do the 50% water change the water is cloudy again within a half hour of completion! HELP! AND i think midnight has finrot so i need some help with that. So what am i gonna do about his water? By the way, i cant get a test kit right now but i can get the water tested every so often by the fish store. PLEASE HELP! ( By the way he lives in a 2.5 filtered and heated tank all by himself.)