So I have recently purchased 6 zoanthid frags off of eBay (mistake) and one was DOA. Another seems to be dying as well (appears they were crushed in transit). It has like 25-30 polyps but about four of them are white with a film over them and they are becoming transparent. Should I leave the frag in the tank? Will these sick polypls kill the rest of the frag (which is healthy and open)? Should I remove the dying polyps or just let nature run it's course? What do you guys think?