Is this algae?

Hi- this is our second summer with our fiberglass pool. Last summer it seem like we had a lot of dust and they were doing road work nearby but it was mostly managed with a robot vacuum and brushing. This summer I am noticing what seems like more accumulation (see pics) on the bottom and on the steps every day. Water also has a greenish tint compared to last year. I was thinking this was dust, but is it actually algae?
chlorine had been running at around 3. I bumped up the SWCG last night...

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