It kind of boils down to simple MATH !. One bichir gets 100% of the aggression, two bichirs get 50% of the aggression each, three bichirs get 33% of the aggression each! Well, you get the picture. Spreading the attention around means no one bichir gets too ripped up. I agree with what everyone else is saying- add a few more bichirs to the tank! IMHO, Johnathan