My cousin was telling me that his african cichlids keep on gasping near the top of the tank and only water changes can help. He has an overstocked 350 gal, but Im not sure exactly how many fish. I told him its probably that the fish need more oxygen. Do you think thats the case? Also, what would be a good way to aerate the water? Im going down to see him tommorrow so we can try to fix this so any advice would be much appreciated. Thanks