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Thread: Raising TA & CH in a closed pool

  1. Back To Top    #1

    Join Date
    Jul 2009
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    Seattle
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    Raising TA & CH in a closed pool

    Since I live in Seattle, I’ve replaced at least 2 feet of my pool water with rain water this winter. So I started to wonder about my CH and TA since the rain shouldn’t have much or either. They were both scary low until I ran the pump for an hour, now they are just low enough that I want to address the issue before I open the pool.

    I figure the smart thing to do is: take the cover off the deep end so I can brush baking soda and calcium chloride around (separately) with the pump running.

    But that seems like a lot of bother. Can I mix the baking soda into the spa water and pump that into the pool. And then rinse and repeat with calcium chloride.

    Is plan B dangerous to me or my pool and spa? I have poured the baking soda into the skimmer in the past, but I’d have to add several inches of water first and then pump it back out after then next big rain.
    20,000 Gallon kidney sort of a sand filtered gunite in ground pool w/ hot tub.

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    Join Date
    Dec 2009
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    Central Massachusetts
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    Re: Raising TA & CH in a closed pool

    Why dont you just wait until you open the pool?
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

  3. Back To Top    #3

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    Flower Mound, TX
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    Re: Raising TA & CH in a closed pool

    What are your numbers?
    10K gallon IG gunite with waterfall; Pentair CC320P filter; WhisperFlo 2 HP pump
    TF Test Kits - Pool Math - Pool School
    "It depends."- JohnT

  4. Back To Top    #4
    Heckpools's Avatar
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    Feb 2009
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    New Jersey shore
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    Re: Raising TA & CH in a closed pool

    unless the numbers are extremely low i wouldnt even go through the hassel..

    Mixing in the spa isnt a bad idea....
    [center:3gj9kdnn]Matt Heck
    "HECK OF A POOL SERVICE LLC"
    Serving Ocean co. NJ
    COMPANY INFO BELOW
    http://maps.google.com/maps/place?hl=en ... 2995187987[/center:3gj9kdnn]

  5. Back To Top    #5

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    Jul 2009
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    Seattle
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    Re: Raising TA & CH in a closed pool

    I don't remember the TA (notes are at home), I think the CH was 150 or 180. So I'm looking at about 1 lbs. of calcium chloride, I think the baking soda was also going to about 1 lbs.
    20,000 Gallon kidney sort of a sand filtered gunite in ground pool w/ hot tub.

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