I have a 40 breeder with 4 fish. A melanurus wrasse, ocellaris clownfish, banggai cardinalfish, and royal gramma. Ive tried twice to add a red firefish, and both times the royal gramma chased them so much, they end up jumping out of the tank, and I find them when I get home. After the first time I added a top on the tank, but somehow the second found his way out through the little holes. So I dunno if I should try to add any more fish to the tank, or just be happy with what I have. Everyone now gets along fine, and I know I dont wanna risk another firefish. Not sure what else to try, or just leave it be?