What not to do... Pop it IF it is valonia, and you can remove the rock from the system, do that and remove the bubble with tweezers or scrape it off, try not to pop it and get the "innards" on the rock. Rinse the rock in salt water and put it back in the system.

If it is a macro of sorts...enjoy it..unless it gets out of control. More pics?

Dave

OOOH... and hey...Pro... welcome aboard

Dave