I've had a tomato clown in my 58-gal reef tank for about 5 years. He's about 3.5 inches long now. The only other fish in the tank is a neon dottyback. Could I add another tomato clown? Would I have to add a larger one? I remember reading that if I added a smaller one, it would probably be killed. However, if it lived, it would change sexes, if needed, to be opposite of the dominant clown. What are the chances of ending up with a breeding pair? Thanks for the input/advice.