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Thread: Small circular stains on stairs

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    Join Date
    May 2015
    Location
    Fort Mill, SC
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    179

    Small circular stains on stairs

    These just appeared one day. They are small, like the outline of a match head, and orange in color. They are a bear to remove. I got after them with some scotchbrite and didn't so much as lighten them up. Any ideas?

    20K gallon vinyl inground pool, Hayward Pro Series sand filter, 1 HP pump, Taylor K-2006

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    Re: Small circular stains on stairs

    Looks like rust stains from metal objects. Try ascorbic acid.

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    Join Date
    May 2015
    Location
    Fort Mill, SC
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    179

    Re: Small circular stains on stairs

    I hit it with some Vitamin C pills and all the elbow grease I could muster. They may have lightened a tad, but not much. I would say they didn't react strongly to that at all.
    20K gallon vinyl inground pool, Hayward Pro Series sand filter, 1 HP pump, Taylor K-2006

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    Re: Small circular stains on stairs

    They definitely look like rust. Try leaving ascorbic acid on the spots for about 30 minutes.

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    Join Date
    May 2015
    Location
    Fort Mill, SC
    Posts
    179

    Re: Small circular stains on stairs

    How can rust just appear like that? There weren't any metal objects on the stairs. I do have metals in the pool that I have to maintain with sequestrants.
    20K gallon vinyl inground pool, Hayward Pro Series sand filter, 1 HP pump, Taylor K-2006

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    In the Industry

    duraleigh's Avatar
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    Apr 2007
    Location
    Sebring, Florida
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    Re: Small circular stains on stairs

    fertilizer pellets?? that's just a guess.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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