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Thread: Mottled, Stained new Plaster! What now?

  1. Back To Top    #1

    Join Date
    Jul 2012
    Oklahoma City

    Mottled, Stained new Plaster! What now?

    We plastered on May 22 afternoon, the next morning they acid washed and when completed, we started filling. It was filled on May 24 and my wife said the PB put in 3 gallons of acid(31%??). I can't remember for sure but filter pump and SWG were turned on within a couple of days. And then on June 5, PB added salt. We brushed and brushed and slowly got the water balanced using the TF-100 kit. Water is crystal clear, kids had fun swimming all summer but the plaster is still mottled and stained in a few places. And we haven't seen PB since the first of June, and I haven't called him either.
    Today, looking at the plaster I realized we had an acid wash but never a proper Acid Startup for new plaster, thanks to Mr.PB.
    My question finally is: Can/should I do a proper Acid Startup now? A few areas are the Tahoe Blue color, a few areas are white and most is a mottled combination. I am thinking shutting down both pumps, adding 7 gallons of 31% acid, brushing 3x/day until all areas are correct color, then neutralizing until pH back to 7.2, then pumps back on and rebalancing water.
    Only other possibility I know is a bad mixing of the plaster prior to application by the plaster company????
    Comments or advice. Thanks, Mark
    IG gunite Edmond, OK(OKC), 18x36 freeform ~20K, 4-8' deep, Pentair equip, (2) 3hp VS+ pump, 520 cart filter, 3 LED, Easytouch8, ItellichlorIC40 SWG, Polaris 3900 cleaner, Spa 8'x18"raised, 20' raised bond beam 2 sheers, Stonescape Tahoe Blue quartz plaster, TF-100 kit.
    Feb. 25, 2014 dig started, May 24, 2014 filled.

  2. Back To Top    #2

    Join Date
    May 2013
    Allen, TX

    Re: Mottled, Stained new Plaster! What now?

    You should call the company you paid to plaster your pool. An acid start is to burn off plaster dust after a newly plastered pool is filled with water and you are way beyond that. There is always some mottling with any colored plaster. Go check out the Wet-edge videos - they even point it out. It is expected to an extent, it would be easier to judge your problem with pictures.
    ~15K gal, IG gunite with new Wetedge Satin Matrix Pebble Finish installed mid 04/14, 1 HP Pentair Challanger pump, Sta-rite System 3 300 sqft cartridge filter, G3 cleaner

  3. Back To Top    #3

    Join Date
    Apr 2013
    Sacramento, CA

    Re: Mottled, Stained new Plaster! What now?

    Call your PB and ask him to come look at it and see what he suggests doing. Generally an acid wash and acid startup are mutually exclusive, you do one or the other.
    22k gallon IG pebblefina, Jandy 1.5 HP VS, Jandy CV Cartridge filter, Fafco solar panels, Polaris 360 supply side cleaner, waterfall

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