sorry guys for the multiple questions today, but hopefully this will be it for a while. Anyway, I moved my live rocks around a bit today, which of course kicked up the sand and caused the tank to become cloudy. Well, everything is settling back down of course, but now I've noticed a lot of tiny white bugs on the side of the glass. They are barely visible unless you're up close (probably about the size of a pin head.) What are these little guys and should I be concerned at all? Thanks again everyone for all your help.