The Blue ones are
VERY difficult to keep. You need a massive amount of
live rock (A very large tank) to support them. From what I've read they feed on the bacterial-film that covers
live rock, but that's just a theory. No one knows for sure what they eat yet. I don't have any experience with them myself. Just what I've read. Your problem doesn't sound like a starvation issue though as that takes months.
