I brought home a leather coral in late December and pretty consistently it gets little chew spots on the tips of the fingers. The spots are white and kind of rough in appearance. They are never bigger then a pencil eraser around. Spots will appear and heal up after a few days and the mean time a couple more spots will appear. I banished a blue leg hermit to the sump for spending a little to much time around the leather however the spots continue. Any guesses on whats chewing on my leather? My cleaner shrimp checks it out at night but I don't really think its him. The only fish I have is 2 chromis, a percula clown, and a royal gramma, all coral friendly. Any ideas?