actually this is kinda funny............most people have troubles keeping inverts.............I have troubles keeping fish, inverts do great! so for a while I stoped getting fish and get an invert every once in a while. the naso is the only fish in there I bought, and I have been wanting a bigger tank. the purple was going to get flushed by one of my friends, so I saved it, and that's why I have 2 tangs. I like them both and think they are both great fish, but I like the Naso a little more. and there is a nice 200 at a LFS here for...........I think it was 1300, and I already have a buyer for my 55