Hey everyone. Sorry as I am new to the hobby and am not good with describing what's in my tank. There are many small, almost clear critters climbing around on the glass inside the tank. I just noticed them in the last few days. It sounds strange, but it reminds me of lice. I tried getting a picture without much luck - as I know my description is awful. Thanks everyone.

Probably copepods and/or amphipods. Pretty good little creatures to have around; they munch on algae and make terrific fish food.

Some pictures here in the ultimate ID thread.