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Thread: CYA loss

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    Join Date
    May 2016
    Location
    Latrobe, PA
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    33

    CYA loss

    What is a normal CYA Loss over a week? I lost 10 ppm from last week to this week. I did a slam last week and everything is great right now. Only losing about 2-3 ppm of chlorine a day. Just curious if 10 CYA loss is normal. It was 45 last week now it is at 35.

    Thanks
    Pool - Above Ground 24' Round by 52" Deep
    Filter - Hayward EC40C92S
    Pump - Hayward 1HP Pump
    Test Kit - Taylor K-2006

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    Texas Splash's Avatar
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    Jun 2014
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    South-Central Texas, Marion/San Antonio
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    12,975

    Re: CYA loss

    Normally we don't experience a big CYA loss each week unless there was a tremendous amount of water exchange. Per "month", maybe 3 ppm or so give or take in areas with intense heat exchange. However, sometimes during a SLAM a pool can experience some CYA loss as noted HERE. Either way, I would simply bump it back to where you need it in preparation for summer and check occasionally as required. Have a nice weekend.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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  3. Back To Top    #3

    Join Date
    May 2016
    Location
    Latrobe, PA
    Posts
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    Re: CYA loss

    Ok. Thanks. It is still within spec so can I just leave it there and check it again next week? Thanks.


    Pool - Above Ground 24' Round by 52" Deep
    Filter - Hayward EC40C92S
    Pump - Hayward 1HP Pump
    Test Kit - Taylor K-2006

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

    Re: CYA loss

    It is still within spec so can I just leave it there and check it again next week?
    Yeah, that'll be OK. I'll be a little surprised if you lose that much next week. On average, I don't think your CYA loss will reach 10 ppm.

    Test it next week and let's see where you are.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  5. Back To Top    #5

    Join Date
    May 2016
    Location
    Latrobe, PA
    Posts
    33

    Re: CYA loss

    Will do. Thanks duraleigh


    Pool - Above Ground 24' Round by 52" Deep
    Filter - Hayward EC40C92S
    Pump - Hayward 1HP Pump
    Test Kit - Taylor K-2006

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