[Myka]

^ Ya they can do a good cleanup! If I were you, I'd remove every single rock out of the tank, suck up all the worms I can see in the tank. Then use a turkey baster to blow the worms off the rock (in a different container), then put the rocks back in. Should nearly decimate the population, at which time you could possibly add a Six Line Wrasse or try to get your hands on some Salifert Flatworm Exit.