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Thread: "rust" spots on bottom of pool

  1. Back To Top    #1

    Join Date
    Aug 2010
    Dayton, OH

    "rust" spots on bottom of pool

    We have a fibreglass pool and in the past couple of weeks I have noticed what look like rust spots on the bottom of the pool. They do not come up with brushing or rubbing.

    Any ideas?

    11.5K gal, IG Fiberglass with automatic pool cover, Hayward Super-II Self-priming Pump, Hayward Sand Filter
    Installed 2004; TF-100 test kit
    Pool is filled from well

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    SW Indiana

    Re: "rust" spots on bottom of pool

    Welcome to TFP.

    Put a Vitamin C tablet on them. I use a PVC coupling to keep the tablet from moving with current.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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