I have 3 Buttikoferi in a 60 gallon aquarium and one of them is 4 inches, the other one is 3 1/2 inches, and the smallest one is 3 inches. The biggest one is constantly chasing the other two buttikoferi all day long and it don't think they will last much longer. I have placed a divider in the tank and put the bully on one side by himself, but the 3 1/2 chases the 3 inch one all day. Does anyone have anything to recommend other than getting another tank? I am thinking of taking the two little ones to a local pet shop and leaving the bully in the 60 gal by himself. What do you guys/gals think?