I have a 30 gallon FOWLR. I have had an ocellaris clown, yellow clown goby and and royal gramma for quite a while and over the weekend I added a black ocellaris clown. For the first couple days everything was fine--the two clowns hung around each other all the time and nobody made a fuss. When I got home yesterday, however, I noticed that the new (and slightly larger) black clown is chasing the old one mercilessly and nipping a lot. He also sort of swims sideways at him (sort of like gouramis in freshwater). Is this normal or should I get rid of one of the clowns? I just set up a 55 gallon last night so would the best bet be to keep little Nemo in quarantine and put big Nemo in the bigger aquaium when it's cycled? Thanks!