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Thread: Second Go Around w/ Replaster and Concerned w/ Spots

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    Second Go Around w/ Replaster and Concerned w/ Spots

    My contractor finished a replaster for a 2nd time. 1st had stains where hose filled down the steps & other issues. The replaster was done on Sunday. I came home to pool after being out of town Monday night. I started the filtration that night & brushed twice starting the next day. To my knowledge nothing was added to the pool. When brushing I noticed a large spot of white that did not move like the plaster dust. I told the contractor. His guy came out today and put about 4 gallons of muriatic acid in pool. The plaster dust is now gone but these large spots are terrible. I'm concerned if these will come out or not. Pool is 15,000 gallons, chlorine pool.

    Your help is greatly appreciated!
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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: Second Go Around w/ Replaster and Concerned w/ Spots

    Welcome to TFP!

    It would be helpful to see a complete set of water test results.
    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

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    Re: Second Go Around w/ Replaster and Concerned w/ Spots

    Got test at Leslie's yesterday around 5pm.
    PH 8+
    TA 90
    CYA 20
    CH 110
    Phosphates 50
    Nothing else was tested

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    Re: Second Go Around w/ Replaster and Concerned w/ Spots

    Tests from today:
    FAC 0
    pH as low as can test <6.0
    TA 0
    CYA 20
    CH 100
    Phosphates 0

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    Re: Second Go Around w/ Replaster and Concerned w/ Spots

    Should the pool pump be running when the ph is so low? Contractor has ph very low to get rid of spots.

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    Join Date
    Jul 2011
    Location
    Arizona & California
    Posts
    768

    Re: Second Go Around w/ Replaster and Concerned w/ Spots

    Pump should not be running with pH below 6.0.
    Any way of determining if white areas are smooth to the touch and is the same as dark areas?

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