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Thread: High CH and TA

  1. Back To Top    #1

    Join Date
    Apr 2016
    Location
    Minneapolis, MN
    Posts
    9

    High CH and TA

    So I have been worried about high CH and TA. Here are my most recent test numbers after adding 121 oz of muriatic acid the day before (Ph was high @ >=8.2

    FC 3.5
    CC 0
    TA 200
    CH 550
    CYA 30
    Ph 7.2

    I am wondering why TA didnt go down at all after adding Muriatic acid? (Was previously 190-200) Is my CH too high? I dont want scaling and dont want to have to deal with Ph swings with high TA.

    What do y'all think?
    26700 Gal Vinyl IGP, Pentair Superflo 1hp Pump, Pentair Sand Dollar Sand Filter, TF-100 Test Kit

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: High CH and TA

    I think you need to aerate to drive the pH back up and repeat the acid treatment.

    The TA result isn't too worrisome. As it says in Extended Test Kit Directions,
    The precision of the measurement is plus or minus one drop when up to 10 drops of titrant are used, or plus or minus 10% of the final reading, when more than 10 drops of titrant are used.
    You're within that range. Effects of Adding Chemicals in poolmath indicates you should have seen about 18 TA drop. You might want to check the notes about static electricity, too.
    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!

  3. Back To Top    #3

    Join Date
    Apr 2016
    Location
    Minneapolis, MN
    Posts
    9

    Re: High CH and TA

    Ok, I will get both returns breaking the surface when I get home. I forgot to mention I tested the tap water I have been adding to the pool after back-washing/vacuuming and what not and its about the same CH as the pool. I will keep working on the TA with the acid and repeat. (I have been wiping the bottle tip with a damp cloth as directed)

    Water looks great though, so I have that going for me!

    Thanks!
    26700 Gal Vinyl IGP, Pentair Superflo 1hp Pump, Pentair Sand Dollar Sand Filter, TF-100 Test Kit

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