GoldsGuy said:I had the same issue in my new tank after it cycled. Didn't bother me at first but kept getting worse and on glass too.
I purchased Zebra Nerite snails and they have almost completely cleaned the diatoms.
They are nice looking striped snails, don't eat plants and most importantly they don't multiply in freshwater. I didn't want to introduce snails that would get out of hand.
They only eat algae and are expert removers of diatoms.