Okay, so recently I got a peppermint shrimp for my newly cycled 14 gallon BC. One of my rocks had a numerous amount of feather dusters on them but when I woke up this morning they were torn up and on 1 out of the 8 remained. Do peppermint shrimp snack on the dusters? Or what may have caused them to disappear? Also, I have 3 hermits, 3 snails, and a yellow tail damsel.