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Thread: Advice on TA/CH

  1. Back To Top    #1

    Join Date
    Apr 2014
    Location
    Northwest Indiana
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    2

    Advice on TA/CH

    I just purchased a home with a pool (in signature).

    Due to a leak in the liner prior to purchase, the water level was down and algae had taken hold. I repaired the liner and SLAMed the pool. After a couple of backflushes of the DE filter, I am at a state where the water is clear and the pool is clean.

    I have a TF-100 test kit. Here are my results from testing today:

    FC - 10.5
    CC - 0
    TC - 10.5
    CH - 525
    TA - 370
    CYA - 30
    pH - 7.5

    I am on well water, so I don't think there is much I can do about the CH level.

    The FC is now falling down after the SLAM. I have an automatic cover, so I don't lose much chlorine to the sun.

    Should I address the TA at this point? I am leaving for vacation in a week and don't want to start screwing with the chemistry and get another algae bloom while I am gone.
    27,500 Gallon IG Vinyl Lined Pool - 18x36
    Hayward EC75 DE Filter
    Hayward 1HP pump

  2. Back To Top    #2
    Patrick_B's Avatar
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    Jun 2011
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    Midland TX
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    Re: Advice on TA/CH

    Welcome AJ!

    Double check the TA reading please. That is pretty high so its good to be sure. Even if it is, don't focus on changing it right now. With your pH at 7.5, (also if correct,) it will take a while to bring that level of TA down.

    It isn't relative to your FC or SLAM so don't worry about that. Focus always on FC and pH first, and you won't go wrong.
    TFP Moderator
    Essential Links:
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    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

  3. Back To Top    #3
    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    37,879

    Re: Advice on TA/CH

    The TA test is sensitive to static electricity. If you haven't already, try wiping the tip of the TA titrant bottle every few drops with a damp cloth/tissue when doing the test and see if you get the same result.
    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

  4. Back To Top    #4

    Join Date
    Apr 2014
    Location
    Northwest Indiana
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    Re: Advice on TA/CH

    I redid the test today and it came out at 360, so essentially the same.

    Should I just wait and see what happens over the next few weeks?

    I don't see any other issues with the pool. Water is crystal clear and FC was down to 6.5 today.

    - - - Updated - - -

    Quote Originally Posted by JasonLion View Post
    The TA test is sensitive to static electricity. If you haven't already, try wiping the tip of the TA titrant bottle every few drops with a damp cloth/tissue when doing the test and see if you get the same result.
    I did wipe when testing. The TF-100 had a special insert about the wiping.
    27,500 Gallon IG Vinyl Lined Pool - 18x36
    Hayward EC75 DE Filter
    Hayward 1HP pump

  5. Back To Top    #5
    Richard320's Avatar
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    Jan 2010
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    San Dimas, CA (LA County)
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    18,768

    Re: Advice on TA/CH

    Expect to see the pH rise rapidly and to need a lot of acid with that TA level. But there's nothing that would keep me from swimming in it right now.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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