Bubble coral help!

[Rhino87878]

My bubble coral seems to be growing some dark algae on its outmost skeleton and the skeleton seems to be turning grey but the coral itself eats every day and opens normally and shows its sweepers at night. I tried to upload pictures but when i do it says upload failed. Does anyone have experience with this?

 

[theshaman]

Mine gets that too. It comes ang goes. My bubble coral is perfectly fine.

 

[AlSimmons]

These links might help.

http://www.advancedaquarist.com/2010/4/corals

http://www.saltcorner.com/Articles/Showarticle.php?articleID=47&i=1