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Thread: Cleaning rust stains from fiberglass spa seat and floor?

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    Cleaning rust stains from fiberglass spa seat and floor?

    A bottle cap got into our fiberglass hot tub, and made some rust stains on the seat and bottom. Anyone have any tips on removing the stains while the water is still in tub? Looking for something that's not abrasive!


    15,000 gal fiberglass pool and spa, SWG, Pentair variable speed pump, Easy Touch controls, Aqua Cal heat pump.
    15,000 gal + Spa 500 gal, Fiberglass, SWG, Pentair variable speed pump, Pentair Easy Touch, Aqua Cal heat pump

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    banditig's Avatar
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    Re: Cleaning rust stains from fiberglass spa seat and floor?

    I suggest a rag soaked in bathtub/Fiberglas shower cleaner. I treat a hot tub much like your house bathtub, but some probably disagree
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    Re: Cleaning rust stains from fiberglass spa seat and floor?

    Try some vitamin C.

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    Join Date
    Aug 2014
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    Northern IL
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    Re: Cleaning rust stains from fiberglass spa seat and floor?

    Yup. Since it's localized, I would use some vitamin C tablets in a sock and scrub the stains. Should work right away.

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    Re: Cleaning rust stains from fiberglass spa seat and floor?

    Thanks everyone! The Vitamin C did the trick!

    15,000 gal + Spa 500 gal, Fiberglass, SWG, Pentair variable speed pump, Pentair Easy Touch, Aqua Cal heat pump

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    Join Date
    Aug 2014
    Location
    Northern IL
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    4,615

    Re: Cleaning rust stains from fiberglass spa seat and floor?

    Excellent! Keep an eye out. You may get a little return where the surface was a tad more porous. Thanks for the update!!!!!

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