Mico Bubbles on Live Rock

[asylumdown]

Not a lot you can do, not a lot you should do either. At this stage I'd say keep nutrients in check and make sure your parameters are stable, and observe. If it gets worse, you'll have a better idea of what's causing it as it will become more visible. If it's something that is going to pass on it's own, you wouldn't want to make it worse by knee-jerk reacting and causing your system to become unstable.