any reason why i can't seem to keep Pom Pom alive in my tank? i have a 180 gallon mature tank with all kinds of corals and fish... everything is healthy in the tank but this is my 2nd attempt on having the Pom Poms .. also had a problem wiht the yellow polyps... some consider these as weeds and expect them to grow all over.. not in my tank! i have regular keyna and xenia and they are doing very well.. thought i would ask! Thanks