I bought 4 of them 1yr. ago over that time period 3 "disappeared" now i have one 5 inch cat! he eats in the daytime 5 min. after he smells food going in. he comes right to the top and speeds back and forth in front, i hold a 1inch krill in his path, and he gobbles it violently! he has NEVER bothered any of the other fish, which included at one time, a french angel,koran,emperor, and others :jumping: