So, my first 4 fish in my 120 mixed a year and a half ago were 4 tiny Ocellaris (spelling) clowns. They all were tiny and the same size. Today, a year and a half later, 3 of them are very large and one of them is a midget. Is that a problem? The midget keeps going into one of my overflows and ends up in my sump. I've seen the bigger guys chasing him around a bit more so recently - not sure if that's a good thing for mating - or if it's an "i'm going to eat ya" thing. If it's a bad thing, next time he ends up in my sump, I'm going to give him away as I don't want him to die...