Not to jack the thread, but this is somewhat on topic. My 8 or so polyp frag of Tubbs blues literally disappeared from my tank about 4 months ago. When we moved the tank the frag reappearred out of the sandbed. After about 3 days they opened back up again, and are as blue as ever. Moral of the story...zoas are tough little SOBs!!! These things were seriously buried in my sandbed for months and are still alive, crazy.