This is wonderful news. I will get some of that!Seems like dead garden variety algae or pollen. Normal. Vacuum slowly to prevent billowing. If you suspect its passing through your filter, consider pool grade DE in your sand filter to improve filtration.
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Add DE to a Sand Filter
A clean pool filter will increase the efficiency of your pool! ... your filter are to backwash it, clean the manifolds and grids, and add new DE.www.troublefreepool.com
THANK YOU!