About a month ago I bought a bubble coral and it faded away. It started by turning brown and seemed to swell some or get bigger then it started falling apart with little cotton looking balls coming off of it. later after that coral totally died, although i dipped it long before it was all gone, I noticed a few of my red mushrooms bigger than ever. A few days after that i notice that those same mushrooms that were huge shrivelled up and falling apart. I would greatly appreciate some help with this disease before it kills the rest of the corals in my tank.