Something is happening to my zoas. At first I noticed some recession on the colony of fire and ice zoas I have on a rock that I'm using to build a zoa garden. Then I had a 1 inch frag plug totally covered in the same fire and ice zoas that overnight was halfway completely cleaned off. I asked the owners of 2 different LFSs near me about it and neither of them could think of anything specific. These issues did start occuring after I added an emerald crab, but they said an emerald crab likely wouldn't have eaten them that quickly, especially just one. Now here's the kicker, I just got a small frag of rasta zoas a couple days ago and now after coming home from work there's nothing but a tiny bit of flesh left of them. It was only 2 polyps but still VERY frustrating. Any ideas of things to check/look for? I havent noticed any sort of pyramid snails, that's what one owner told me to check for. All these colonies and frags are either on the sand bed or close to it so I asked if my current spaghetti worm infestation could have caused it and they said not like it's happening.