My levels are good and water is clear but I keep seeing small algae spots on my thermoplastic stairs and the corners of the skimmer opening. I'm also seeing dust on the bottom when I vacuum/brush but I assumed it was pollen because we've had a ton of it and the pollen gets dumped into the pool when I take the solar cover off. The only other thing I can think of is that we've had a lot of rain so I've been leaving the cover on and the pump running at low speed so maybe I'm not getting enough circulation? I'm doing an OCLT tonight.