I received an army of acros today and dipped all of them for 2 minutes in Coral Rx (I limited the time because I didn't want to damage the more sensitive acros). Boy am I glad I did because the little guy in the photo below came off one of them. Is this an acropora eating flatworm? It sure looks like one. This coral got 15 minutes in the medicine bath. I'd rather kill it than infect my tank. I also inspected each coral with a 16x loupe after dipping in case something was missed. This innocent looking coral carried the unwanted hitchhiker!