White Bumps on Zoos???? Help

[Emoezekielsr5]

Late i've noticed one of zoo colonies are closed up and have these white bumps around it, does anybody know what they are? Please Help me figure this out. Cures?

 

[DJ88©]

this thread may help..

http://www.reefcentral.com/forums/showthread.php?s=&threadid=691978

 

[altezza]

Did you lose this colony?