I had a flowerhorn for about 5 months it got huge really fast in a 40 gallon and when i did a water change on fri. and totally moved around the whole tank. That night a clown loach of mine died for some reason? Then the next morning my flowerhorn was barely swimming and it was laying on its side barely breathing I have no idea what caused its death. Someone told me never to feed my fish feeder fish? Im farely new to this and have no idea what happened maybe it was ick but im not sure the Flowerhorn changed colors when it was sick.