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Thread: Weird Stains on Stone and Tile - I think metal?? Pics Attached

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    Weird Stains on Stone and Tile - I think metal?? Pics Attached

    These stains occurred on after I installed my SWG. I think I was rambunctious and ran the SWG longer than needed per day...

    Any products to help remove? Thanks

    Stone.jpg

    Tile.jpg

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    Re: Weird Stains on Stone and Tile - I think metal?? Pics Attached

    The stains appear above the waterline....the SWG wouldn't cause that unless your pool water was up that high......was it?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Weird Stains on Stone and Tile - I think metal?? Pics Attached

    The stains on the stone are around the waterfall feature and would get wet. The tile stain is above the water line. However, this is an underground hot tub (though we never heat it). So any wind can kick the water above the "waterline".

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    Re: Weird Stains on Stone and Tile - I think metal?? Pics Attached

    Without test results, it's a bit of a guess, but it looks like calcium deposits. A mixture of 3:1 water and muriatic acid will get most of it. Apply the mixture and, if the stains foam up, it is calcium. rinse after cleaning.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Weird Stains on Stone and Tile - I think metal?? Pics Attached

    Those aren't metal stains in the usual sense, though there may be some iron involved. Looks like efflorescence to me. Presumably caused either by water either seeping through the wall or moisture from the pool running down the wall.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Weird Stains on Stone and Tile - I think metal?? Pics Attached

    After looking at pics of efflorescence it does look close. Will the muriatic acid work for efflorescence? Thanks

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    Re: Weird Stains on Stone and Tile - I think metal?? Pics Attached

    Will the muriatic acid work for efflorescence?
    Yes. It will come back more readily as it coming from behind the stone and will continue to do so unless you can find a way to redirect the flow.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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