We recently bought a five gallon aquarium as a present for my daughter's third birthday. It has an aquatech power filter. We put in two bags of gravel and three fake plants. The associate at Wal mart failed to explain to us just what we were getting into, and we killed six fish. (Poor little guys.) Once we got the aquarium stable we went back to the store and bought new fish. We have one three inch shobunkin and three one inch common goldfish. We also bought five ghost shrimp. My husband did a 30% water change and the tank went cloudy. It has been cloudy for a full day now, and we have cut feedings to twice a day. I thought we over fed them, but I learned about bacteria bloom, and that seems reasonable. My question is more or less, is this bloom safe for the fish? What kind of harm can come to the fish if we do no remove them until the tank balances back out?