I never got the opportunity to frag my xenia. Every one I've ever had has just ended up melting away within weeks. I hear that a lot of people have this problem with xenia, and nobody really knows why. It's just hit or miss depending on the tank. I've also heard the same thing about short-tentacled plate corals, that some people have no problem keeping them, but other people with otherwise perfect tanks just can't seem to keep them alive. I wasn't able to keep my short-tentacled plate coral alive, but everything else in my tank does just fine. Weirdness!