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Thread: Efflorescent anyone???

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    lka674's Avatar
    Join Date
    Jul 2012
    Williamson County, Texas

    Efflorescent anyone???

    My natural stone tiles under my pool coping have some pretty ugly looking efflorescent build up...just the powdery mess that disappears as soon as water hits it, but then comes right back as soon as it's dry. I've tried very diluted muriatic acid followed by quick scrub and fresh water rinse, but didn't help much if at all.

    Has anyone here tried any of the products out there that "claim" to get rid of efflorescent off of stone tiles by penetrating the stone and creating a barrier to prevent the salt from getting back out??? (at least I think that's how it works)
    Pool grand opening Sept 2010. 100% sun exposure. Beach entry with fountain, IG gunite pool, approx 11,000g. Hayward HK sand filter. Intelliflow VS 350 pump w/ max flow rate 160 gpm. Dolphin (cordless) M5 Liberty pool cleaner. The pool has waterfall at one end with a tanning ledge and a spa at the other end that has a spillway into the pool and there is a water shear falling from the pool equip wall into the spa. DH did a beautiful job of designing it himself!

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Efflorescent anyone???

    The only reliable solution is to block the water from getting behind the stone in the first place. The water carrying the efflorescence is passing through from the back, which is how it picks up the salts/minerals that leave the "marks". That requires tracking where the water carrying the efflorescence is coming from, which is sometimes easy and sometimes extremely difficult. The sealers that try to treat it from the outside tend to not work well, though now and then they work out. There has to be water back behind the stone and it needs to come out somewhere, so the front side sealers usually just move the affected areas around.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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