Small bugs in Reef Tank

We have had a 24gal Nano Cube tank and have enjoyed it a lot. Recently
however, we have noticed some very small white bugs crawling in the rear
of the tank wall and on the side glass too. We really do not have any
problems at the moment with any of the habitants, but we are concerned
that these small bugs could cause some troubles. I don't think that I
can take a picture of them because they are only 1mm in size. I can see
them with the eye and they have four or so antennae on the front of them
and something similar on the rear, but I can tell back from front. Any
thoughts or suggestions would be greatly appreciated.

Russ