It's not a disaster, since these zoas grow like crazy, but overnight 75% of the main polyp on this frag has turned almost completely white on the top and the stem and surrounding area are also very pale. What do you think could cause this? Hopefully it won't spread.
Hard to get a clear picture, since it has to be at an angle through the glass.
Hard to get a clear picture, since it has to be at an angle through the glass.