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Thread: High CYA

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    DSdiver's Avatar
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    Sep 2013
    Location
    South Eastern Wisconsin
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    28

    High CYA

    Just got the pool open for the year and all the chemicals good except for the CYA. My wife read the pool math amount wrong and after a week it was at 90. My question is do I need to drain and refill (test results 10 min ago below) or can I mantain it at a higher level and let it come down as we vacuum and back wash and then top it back off as the summer progresses.
    Pool is crystal clear.
    Test results
    FC 6.5
    CC .5
    Calcium 200
    TA 100
    CYA 90
    PH 7.2 fountain and slide are on as I post this
    Salt 3400 PPM
    All test were done with the TFT test kit XL 12 months old
    20x40 IG vinyl lined 34,100 gallon/Hayward filter EcoStar model SP 3400 VSP/Hayward filter(sand) model S310T2 flow rate 98GPM/RayPack gas heater model 266 266,000BTU/Aqua Plus Automation and chlorination with Hayward Turbo Cell T-Cell-15/Hayward universal color logic light/ Delta UV filter/4 return lines 2 skimmers and dual main drains/Auto cover/ Pool is 3 years old. TFT test kit XL speedstir.

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    Azgirl71's Avatar
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    Apr 2015
    Location
    Sierra Vista, Az
    Posts
    2,586

    Re: High CYA

    Your results look good. If your pool looks as good as your results then I don't see a reason to lower CYA. You will lose some overtime with backwashing ect. Now if your pool is not crystal clear I would recommend lowering it in case tou need to SLAM.
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

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    DSdiver's Avatar
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    Sep 2013
    Location
    South Eastern Wisconsin
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    Re: High CYA

    Thanks for the quick response,she is looking crystal. Should I mantain the FC at say 7 with a higher CYA? I looked at the chart but it doesn't go to 90.
    20x40 IG vinyl lined 34,100 gallon/Hayward filter EcoStar model SP 3400 VSP/Hayward filter(sand) model S310T2 flow rate 98GPM/RayPack gas heater model 266 266,000BTU/Aqua Plus Automation and chlorination with Hayward Turbo Cell T-Cell-15/Hayward universal color logic light/ Delta UV filter/4 return lines 2 skimmers and dual main drains/Auto cover/ Pool is 3 years old. TFT test kit XL speedstir.

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    SCon36's Avatar
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    Jul 2014
    Location
    Bedford, KY
    Posts
    118

    Re: High CYA

    Target FC should be 10 with a 90 CYA.
    SCon36

    24,000 Gallon IG vinyl pool (16x36x8) with Hayward S200 sand filter and Hayward pump and heat pump. Built August 2011. I use a Taylor K-2005 test kit with a K-1515 add on.
    https://www.youtube.com/watch?v=bIgL...0MyAw&index=29

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    DSdiver's Avatar
    Join Date
    Sep 2013
    Location
    South Eastern Wisconsin
    Posts
    28

    Re: High CYA

    Ok thank you
    20x40 IG vinyl lined 34,100 gallon/Hayward filter EcoStar model SP 3400 VSP/Hayward filter(sand) model S310T2 flow rate 98GPM/RayPack gas heater model 266 266,000BTU/Aqua Plus Automation and chlorination with Hayward Turbo Cell T-Cell-15/Hayward universal color logic light/ Delta UV filter/4 return lines 2 skimmers and dual main drains/Auto cover/ Pool is 3 years old. TFT test kit XL speedstir.

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