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

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    0  Views: 957 Answers: 1 Posted: 13 years ago
    Tags: swinning pools
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      1 Answer

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

      8 years ago. Rating: 4
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