the tomato and the oscellaris get along fine. the tomato used to chase away the other 2 when i had my anemone. but ever since i removed the anemone, the tomato has been very peaceful. they actually swim and play together. the original gsp really took off after i got another tiny 1-inch gsp frag next to it. they seem to be competing to see who can spread the fastest. i did the same thing with my zoas. i'd put 2-3 different zoas 1 inch apart, and they seem to spread faster as a result. could be coincidence, but who knows.