I have 3 raphael catfish, 4 corys, pleco, and a freshwater dolphin, all are still very small, not over 1", except the 2" dolphin and pleco. I feed these guys bloodworms only, and they do make alot of waste (poo) in the tank. Sometimes I forgot to clean that waste, but on the next day the bottom tank always clean. Could the the corys and the raphael cat have eaten those waste (poo)?