What are these?

brees

brees

New Member
Small round things that kind of look like black pearls growing on our live rock. Good or bad?
 
yearofthenick

yearofthenick

Active Member
Bubble algae. Whatever you do, don't pop them in the tank because they'll start growing everywhere. Probably best to take the rock out and scrub it off, then rinse. Or keep it there.
On second thought, I've heard that some invertebrates eat this stuff, but I don't remember what kind.
 
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