Sorry to hear about this meowzer. I didnt read this whole thread, but did you try to dip it, or even move it off the sand bed? I def. think you will have to frag it to save it. Its ok though, I just had to break off a small piece of my pink birdsnest that was atleast 5in, all of it was turning white, but it worked, and now the little frag is starting to grow good. I did notice that at night the bristleworms and amphipods would eat on the dying part.....