i used that "Flatworm Exit Dip" on my tank. harmless to all my corals and fish. It got rid of them in two seperate doses. Unfortunatly though, it didn't get to the ones at the bottom corners of my tank so now, a few months later, the problem is starting all over again. i'm thinking about getting a nudi. don't really want to but there's nothing else i can think of to do to help hte problem
good luck with yours