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Thread: Will my low CH eat my gunite????

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    Will my low CH eat my gunite????

    Hi, Folks…Good to see you all again.

    On my 3rd year of the BBB method and I’m as pleased as punch, but have a question for you astute members. I believe I have had the same CH reading since I started, but can’t remember.

    15,500 gallon in-ground gunite pool circa 1975.

    pH = 7.35

    CYA = 35

    FC = 10 (normally 4-7, but just the tail end of the winter shock)

    TA = 100

    CH = 60 (!!)

    I just dumped 10# of baking soda in the pool yesterday to raise the TA from 30 to 100 and I thought it would also raise the CH, but it didn’t.

    Should I worry about this? Will the low CH level eat the gunite?

    Thanks for your help…I always feel confident when I come here with a question.

    (Sorry...more wisteria than pool, but that's all I have)

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

    Re: Will my low CH eat my gunite????

    Welcome to TFP!

    A few days aren't a problem, but you do not want to leave things that way. Definitely raise the CH level.

    Baking soda never increases CH. You need calcium chloride to do that, often sold as calcium increaser at pool stores and available in some areas as ice melting salt.
    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

    Re: Will my low CH eat my gunite????

    Thank you so much Mr. JasonLion for your quick reply!

    I'm putting my best man on that as we speak!

    This is such a great forum. Thanks for making it that way.

    My Best!


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