the elephants are not a good community fish for your setup and they get up to 10 inches. They are delicate and bother other fish with their electric navigation organ. they are best alone or with other sedate fish. You could do yoyo loaches as an alternative to clowns, same shape and nice colors but they stay around 2-3 inches. an african butterfly fish would be a neat addition but watch the khulis if you get one.