I drove the 1.5 hours to my LFS today with the intent on getting more fish for my aquarium. I only had 4 emerald green cats and wanted more. I have a very good filter, a Hagen Aquaclear 50 (which is more than double the filtration power for a 20 gallon) and the LFS said that with that powerful of a filter I could fit about 30 inches of fish in my tank. I really trust what the LFS says because they are regionally renowned for their expertise. Anyway I told him I wanted a Pearl Gourami because they seem like such sweethearts and he recommended that if I have my heart set on some cichlids that I should get 3 brichardI cichlids. The brichardis are young and small, but the LFS assured me that they are peaceful and will really only hang out with themselves. I took his word and bought 3 of them (they're quite expensive). It seems that I read online that once they get to be adults they turn into the bullies of the tank and can get quite aggressive. They are all males so they shouldn't get aggressive cuz they won't be breeding, right? My tank is full of fake plants and decorations to stake out territory and hide. Is it completely hopeless to keep these cichlids in with other fish? I know that cats have armor not scales so I'm not worried about them, or should I be? The pearl gourami is at about 2 inches right now. Please give me some advice. They're not picking on anyone right now and I hope it stays that way because they're adorable! Thanks!