being a noob I cant really help much, my 1 year saltwater anniversery is coming up soon...... I can say I've seen zoanthids last through pretty much anything. I once had a quarintine tank that I took everything out of on a tank move, and I left two 3-6 polyp frags of some zoas I had 3 100+ polyp colonies of in there. There was no flow, no light, no filteration, and a heck of a film on the top of the water for close to 2 months. a couple nassiserius (note i cant spell and dont even try) snails that were in there and the zoas made it fine lol, I threw them into my display tank the other day as a test and they opened up, their color is bleached from what a healthy frag would look like but none the less they seem to be getting better week by week. ps a chunk of a montipora frag that was left in there was dead within the first week. Anyway sorry about the crash and good luck with the recovery! Hope I'm not missing anything but I'm wondering what caused the crash? - Matt