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    what are the black spots on the bottom of my swimming pool?

    its a concrete pool the spots seem to be growing. is a fungus or mold. how do i get rid of it?

    0  Views: 982 Answers: 2 Posted: 14 years ago

    2 Answers

    It's algae. See how to get rid of it here>>https://www.swimuniversity.com/how-to-kill-black-algae-in-your-swimming-pool/

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