I have a yellow tang, a flame angel, a trio of square anthias, sand sifting goby, purple firefish, and a pair of banggai cardinals as well as the clowns I just mentioned above. The percula clown is hosting a colt coral I think, and the clarkii is hosting a toadstool. I do plan on having a rose tip anemone in my tank. Some other corals I have are a hammer coral, a large frogspawn, and a torch. There is a little bit of aggression between the clarkii and the percula, but it is really only during feeding time Also the clowns I have are not really a pair from what I have seen. They do hang around together some times but I have never seen any mating behaviour