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Re: Need some advice please

Subject: Re: Need some advice please
by fcmf on 4/3/2021 17:14:42

That looks like brown algae / diatoms. You might find this helpful:
https://www.thesprucepets.com/aquarium-algae-1379979

The white foam is most likely an accumulation of bubbles. Ensuring the filter outlet is skimming the water surface ought to address that.