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Thread: Pool start-up questions

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    Pool start-up questions

    Hello TFP gurus,
    Just opened the pool 2 weeks ago. When it went to bed, BBB-method chem was perfect. Safety cover on all winter.
    Upon removing cover, not too bad looking, and what there was cleaned up quickly after shock and vacuum.
    However:

    (1) the initial pH was very alkaline; alkalinity was 180-190; and there was a deposit of whitish crystals which the robot picked up for about a week.
    I gradually added acid (~5 gallons over the 2 weeks) and the pH is now 7.3-7.4 and TA down to 85.
    What was that white stuff? Do I have a potential plaster problem?

    (2) Current chemistries (via Color-Q, which I love compared to sticks):
    FCL 0.82
    TCL 1.10
    pH 7.4
    TA 85
    CH 184
    CYA 53
    So I added bleach, of course; but do you think I ought to bump up the hardness a little?

    Thanks as always.
    Location: Media, PA (Philadelphia suburb).
    In-ground, 13,000 gallon pool, plaster, built 2008-9.
    Pump Whisper-flow 60 gpm DE filter
    Spa: 2013 Hot Springs/salt generator

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    Mod Squad zea3's Avatar
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    Jul 2009
    Location
    Houston, Texas
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    Re: Pool start-up questions

    Yes, bring the CH up to the minimum recommended level of 250 ppm.
    TFP Moderator
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    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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    Re: Pool start-up questions

    Thank you, will do.

    And, see original post: what were those white crystals?
    Location: Media, PA (Philadelphia suburb).
    In-ground, 13,000 gallon pool, plaster, built 2008-9.
    Pump Whisper-flow 60 gpm DE filter
    Spa: 2013 Hot Springs/salt generator

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Pool start-up questions

    They were some variation on calcium scaling, but with something else crystalizing with the calcium causing it to form crystals instead of scale.
    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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