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Thread: Plaster mottling normal?

  1. Back To Top    #1

    Join Date
    Dec 2013
    Orange County, CA

    Plaster mottling normal?

    Is some mottling normal for a new replaster? It's about four months old.

    Pool Specs: 26K, IG, Plaster, Hayward 1HP Superpump, Hayward ProGrid DE 6020

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Plaster mottling normal?

    Plaster colors darker than white are never completely even, i.e. there is always some mottling. Your color variation is about what I would expect, though the pattern of the variation is more unsightly than normal.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Join Date
    Mar 2011
    Houston, Texas

    Re: Plaster mottling normal?

    Yours looks a lot like mine--especially the roundish splotches. I've heard that a no-drain acid wash might help, but it reduces the life of the plaster. I just live with it. It's only really noticeable in low light. When the sun is out it looks fine. And I don't believe you have calcium scale. This is the condition that Onbalance has written about.
    9,200 gal. Gunite Luna Quartz French Grey pool with spill over spa, two fountains on tanning ledge (rarely used)
    Pentair Whisperflo 2HP, Pentair CCP Cartridge 420 Sq. Ft., Polaris 280 with booster pump
    Pentair EasyTouch 4, RayPak LoNox 266k Natural Gas heater, Aqua Rite SWCG T Cell 9, Borates, TF-100 test kit

  4. Back To Top    #4

    Join Date
    Jul 2011
    Arizona & California

    Re: Plaster mottling normal?

    I just came across this post today.

    The mottling and white spotting in your pool is not normal.
    See this post for further information:

    This problem is also why your calcium level is increasing rapidly.

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