did you say you feed your fish once every two days? when you rush everything, often you have to start over, because everything dies. you need to do a water change without stearing sand or dirt on rocks, do like 25%, after that put machenical filtration into your filter or sump. condition and buffer your new water good before you put into your tank. cut down on the time you run your lights by few hours for few days. that should do it
