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Thread: Rust Stains on Bottom of Gunite Pool

  1. #1
    Join Date
    May 2010
    Posts
    12

    Default Rust Stains on Bottom of Gunite Pool

    In January of this year I noticed several small (1-1/2” long) rust colored stains at the bottom of my gunite pool. It was finally warm enough this week for me to dive down to inspect them. I unsuccessfully attempted to remove them w/ a wire brush. They appear to me to be rust stains, although I never found the culprit (nail, screw, etc.).

    Does anyone have any suggestions as to how they can be removed?

    Thanks
    24,500 Gal Underground Gunite
    Cartridge Filter
    SWC

  2. #2
    Join Date
    Jul 2010
    Location
    Largo, Florida
    Posts
    499

    Default Re: Rust Stains on Bottom of Gunite Pool

    Quote Originally Posted by kc101 View Post
    In January of this year I noticed several small (1-1/2” long) rust colored stains at the bottom of my gunite pool. It was finally warm enough this week for me to dive down to inspect them. I unsuccessfully attempted to remove them w/ a wire brush. They appear to me to be rust stains, although I never found the culprit (nail, screw, etc.).

    Does anyone have any suggestions as to how they can be removed?

    Thanks
    Try placing a Vitamin C (ascorbic acid) tablet directly on one of them for a few minutes and see if it has any effect. If so, you could probably proceed with a full ascorbic acid treatment.

    http://www.poolforum.com/pf2/showthr...acid-treatment
    rectangle 11.5K gal IG concrete pool;; 125sf cartridge filter; 2hp 1 speed pump; K-2006, k-1766; PF:10

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