I have a colony of generic brown button polyps and I noticed today that some of the bulbs are withering away. it seems as if they are corroding and there is white spots on their stems. Any thoughts on what this may be? there are even stringy substances coming out of the colony. Is this contageous? I am new to keeping corals, any suggestions on treating them, or are they goners for sure? Should I rip them out of the tank? HELP!!!!!:dead1: