Do they spit out the bad stuff once they've digested it? It's not infrequent that my new scoly, indophyllia, and acanthophyllia get some sand in with the mysis. I realize it's not a good big deal to spit out a big shell, but small sand?
Glad to see the LPS finally eating the critters that usually steal and maim the LPS! I bet the hermit was trying to steal some food out of its mouth and was in for a big surprise! My hermits are little vagrants and won't be replaced when they perish.