Hi. I need help. I have a 20 gallon tank and I got some dwarf cichlids for it. I have let it cycle for a week and a half.. When i put my new cichlids in the tank the started breathing really fast and one just stayed at the bottom. The two that were swimming died and im left with just one + a pleco now. They've been moved to a smaller and welly filtered tank but i dont know what the prob is. the amonia and nitrates are at zero but the tank has started to turn cloudy. i have used amonia disolving tablets and nutrafin cycle on this tank with the proper dosages. This was before i got the fishies. I have had no luck with fish in this tank and i want to know what the problem is seeing that i have put alot of money into this tank. Thanks so mutch!