alveopora help

[sp1187]

any one know what this is and what to do about it?
when I bought it a few months ago, it was all green.
I have 3 other alveoporas and they are all "clean".
also, a few of the disco mushrooms near this piece are now getting the same thing.

 

[Retro Reefer]

Never seen anything like that, I would pull it and dip it along with effected shrooms ASAP