I agree with serra,
When I was looking for somemore negative comments, people would say they would do fine with larger fish. Its just they tend to show aggression to the smaller type fish. I KNow with my RTBS, he ignores all the larger fish and goes after my female neon rainbows and sometimes my boesemans, he does this only ONCE in a while maybe I just keep him well fed? he has a FAT belly....