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Thread: Grout Efflorescence in Several Areas

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    Mod Squad tim5055's Avatar
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    Grout Efflorescence in Several Areas

    I have Grout Efflorescence occurring in several areas of the tile wall (above the water line). It only occures on the "higher" side of the pool. The lot has a heavy slope and one wall of the pool is higher, holding back this area. It appears that ground water is leaching thru the tile/grout causing Efflorescence in several areas.

    Here are a few photos, a wide and 2 close ups







    I have scrubbed one of them using white vinegar, a wire brush and a stiff putty knife. With work I can get it off. I saw another post on the forum that referenced this Purity Pool OS Out Spot Stain Remover and am thinking that the muratic acid will clean more than the vinegar.


    Solutions?

    Thoughts?

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    JasonLion's Avatar
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    Re: Grout Efflorescence in Several Areas

    The only permanent solution is either to waterproof the other side of the way or to install a french drain so water doesn't get to the other side of the wall. Waterproofing is pretty much out of the question at this point, as that would involve tearing up the deck. Putting in a french drain is possible, but will be fairly expensive.

    Muriatic acid diluted four parts water to one part acid should be far more effective at cleaning the surface than vinegar.
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    Mod Squad tim5055's Avatar
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    Re: Grout Efflorescence in Several Areas

    Thanks Jason,

    Muratic acid did the trick. As i talked about I picked up a Purity Pool OS Out Spot Stain Remover from Amazon and every time my pool needed acid I loaded it and wiped acid on the spots.

    Here are a couple of photos showing the previous areas





    You cant use the Spot Stain Remover to scrub, just to apply the muratic acid. I applied it and let it do its work for a few minutes and washed it off to keep it from removing the grout. Time and patience are winning.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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