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  1. N

    Black stain

    Hi I’m new to this group. I keep Getting these stains. Mostly along seams of pool. I brush and they move and sometimes they become white when I shock. Sometimes they become hard to remove with brush. I’ve used a dish sponge to scrub it and it comes off. I find it hard to scrub in deep end. What...
  2. 386DB0E8-248C-4F7D-BC45-DE1E1D0E00D7.jpeg

    386DB0E8-248C-4F7D-BC45-DE1E1D0E00D7.jpeg