My elegance has been thriving for a year, but lately it has been drawn up. I checked all parameters and was fine. I've done 2 30% water changes. All of my other corals look great, but something is wrong with the elegance. I started looking last night, and in that corner of the tank, there are these very fine, tentacle looking things, all over the sand. They're extremely small, like hair, but there are a lot of them. They seem to just spring up from out of the sand, and they're only around the elegance. I don't have a camera good enough to take a picture of something that small. Any ideas?