I had a bipartitus, an ornatus and a geoffroy getting along great for about a month, when the Potter's began harassing the smaller Ornatus. She was relentless, and drove the other under the sand, and kept her pinned there until she died. When the Ornate was gone, the Potter's turned her aggression to the Bipartitus. The Blue Star was a little tougher than the Ornate, but it was still a rough situation. When I acquired a Chaoti, I knew I had to solve the problem. I tried to catch the Potter's but that wasn't going to happen. As a hail mary, I taped a mirror (about 4"x6") to the glass in the back corner. It was like flipping a light switch. Immediately, the Potter's became more interested in the mirror than the other fish, and all three were able to be out and about together without any chasing, nipping or other signs of aggression. Apparently, they feel more threatened by the fish that looks exactly like them, then the others. Now, they all seem to have lost interest in the mirror, but also in each other. I haven't taken the mirror down yet, because I still see them hanging out in the corner from time to time, but there is zero aggression between the different leopards now.
