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Thread: Cya agent question

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    Join Date
    May 2015
    Location
    pittsburgh pa
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    Cya agent question

    First off pool is marvelously clear, numbers are good and slam complete.

    When i tested in April had
    CYA 60 so slammed at that number 24 fc

    May 6th completed slam with 0 overnight chlorine loss.
    PH 8
    TA 100

    So i added some muriatic acid to which brought me to
    PH 7.4
    TA 80-90

    Now we've had a good deal of rain in Pittsburgh, and i did have to pump out about 4 inches of water. Tested CYA today plenty of sun and I'm coming up with 30, almost to point of the dot not disappearing.

    Is it possible that the agent is bad, or has my CYA really dropped 30, which i wouldnt complain about. I could cut down my chlorine usage, but i dont want my pool to turn green.
    11,000 gal (21' round) AG
    DE EC40

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    Mod Squad jblizzle's Avatar
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    May 2010
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    Tucson, AZ
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    37,389

    Re: Cya agent question

    It is pretty rare for that specific regent to go bad. But, it should not drop 50% without replacing 50% of the water.
    So, I really have not explanation.

    FYI, you will actually loose more FC ppm to the sun at lower CYA ... so you may find you are actually adding more bleach while trying to maintain a lower FC level.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    Re: Cya agent question

    Quote Originally Posted by jblizzle View Post
    It is pretty rare for that specific regent to go bad. But, it should not drop 50% without replacing 50% of the water.
    So, I really have not explanation.

    FYI, you will actually loose more FC ppm to the sun at lower CYA ... so you may find you are actually adding more bleach while trying to maintain a lower FC level.
    should i use some pucks to bring it up?
    11,000 gal (21' round) AG
    DE EC40

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    Mod Squad jblizzle's Avatar
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    Re: Cya agent question

    That is one option or add stabilizer separately.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    duraleigh's Avatar
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    Apr 2007
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    Sebring, Florida
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    30,084

    Re: Cya agent question

    It will take quite a few pucks to raise it to a suggested 40 but if you have some around, that's fine to do it. I usually like to see folks add the powder and save the pucks for vacation but both work.

    Nice work on your pool! You're a TFP'r for sure.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  6. Back To Top    #6

    Join Date
    May 2015
    Location
    pittsburgh pa
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    Re: Cya agent question

    Quote Originally Posted by duraleigh View Post
    It will take quite a few pucks to raise it to a suggested 40 but if you have some around, that's fine to do it. I usually like to see folks add the powder and save the pucks for vacation but both work.

    Nice work on your pool! You're a TFP'r for sure.
    Thanks Dave,I truly take that compliment.

    My wife's like there he goes with his blue box

    This site is the best time I spend on the net! So many knowledgeable people willing to help is extraordinary today!
    11,000 gal (21' round) AG
    DE EC40

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