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Thread: Brown Stains on Tile/Grout NOT UNDER WATER

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    Join Date
    Apr 2013

    Brown Stains on Tile/Grout NOT UNDER WATER

    Hi all - a newbie here to the forum and pool ownership, so please be gentle. Purchased a home with SW pool in November. Trying to get it ready and all is going well with pool balance, etc. However, we have an unidentified stain around the rim of the pool that will not respond to anything we throw at it (muriatic acid, ascorbic acid, brass and steel brushes...) We live in GA so we thought that perhaps the water level got too high at one time and caused that Georgia red clay to ooze out from under the deck. We also thought that the metal strip at the top of the tiles that meets the deck was rusting. I've attached pics for reference.. Any suggestions would be welcomed. Thanks in advance.

    Atlanta - GA
    Attached Images Attached Images
    Tom D.
    Watkinsville, GA
    Pentair 48 FNS Plus
    SW - 28,000gal. Inground gunite

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    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    SW Indiana

    Re: Brown Stains on Tile/Grout NOT UNDER WATER

    I'd have thought muriatic acid would have done it. It looks like the problem isn't as bad in areas where the coping covers the top of the tile. Does that hold true everywhere?
    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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