I bought a very nicely priced hammer from a reputable company recently and it never did well, never opened up, then died. Well, now I have noticed that a few of my other wonderful corals have some sort of pest. I am guess that it is a pink / red flatworm. It looks as if my frogspawn and torch corals have pink tips that move. Have not seen these on anything else, or in the sand. One of my corals has a single head that has recently gotten "ill". Any way to keep these from killing my corals? How? Help!