Do they kind of look like very tiny feather dusters moving in the aquarium current??
I had/have the samething, in my tank its where the outakes of my fx5 and circulator blow, scrape and change water or add stresszyme, i have very clean bi weekly tested water and my nitrates never exceed 20-25 ppm. I do change 60-70% per week w/ 1300gph/90gal=13.3x T.O. Ive heard it may be BB growing in certain places of turbulance, adding bio has helped too.
#1 S. Vettel
Typically tiny feather duster looking things are usually (from what I've seen) a species of Dinobryon, a colonial organism classified as golden algae. They're completely harmless, just unsightly when they start covering the glass (making it appear cloudy).
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