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Thread: high cya

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    high cya

    first post opened pool this week cya of looks like 110 ta 40 calcium hardness 90 ph 7.0 now using intex salt gen. can cya be right after cold winter no chlorine since water got below 55? used pucks last year. thanks for your help oh yeah 15000 gal.vinyle 14 by 28 also ran numbers twice ta of 40
    15k, ig ,vinyle ,kitbuilt, 1hp hayward, 24 hayward sand, 2-intex swg`s, manual cleaning, leslies k2006 test kit,14x28, fiberglass steps

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    Re: high cya

    Welcome to the forum!

    That CYA test result is probably correct. Especially if you did it twice and got the same result. Why do you think it may be wrong? Were you expecting it to decrease over the winter? Some pools do, some do not.

    It sounds like you know this, but continued use of the pucks will only drive the CYA higher (Sorry, I overlooked that you now have an SWG). I would plan on partial draining to reduce the CYA and get your pool more manageable.
    Dave S. - Forum owner
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    JasonLion's Avatar
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    Re: high cya

    You should raise your TA level to around 70 to 80. I would also lower CYA down to around 90 by replacing water. CYA test results over 100 are not precise and could actually be much higher than you think (or not, its impossible to be sure). By getting CYA down below 100 you can be much more confident of the test results.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: high cya

    Thanks for the quick response was hoping maybe not to drain pool, calc said 67% if I looked at it right. just added salt water looks pretty good thanks again looks like I have some pumping todo.
    15k, ig ,vinyle ,kitbuilt, 1hp hayward, 24 hayward sand, 2-intex swg`s, manual cleaning, leslies k2006 test kit,14x28, fiberglass steps

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    Butterfly's Avatar
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    Re: high cya

    Quote Originally Posted by taintn
    Thanks for the quick response was hoping maybe not to drain pool, calc said 67% if I looked at it right. just added salt water looks pretty good thanks again looks like I have some pumping todo.
    Lowering your CYA from (estimated) 110 to 90, I'm getting a water replacement of 18% - not 67%.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
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    Re: high cya

    pumped out about 25% water yesterday, after refill numbers alot better ta80, ph7.4, ch180,cya75, salt 2240 thanks again, any suggestions appreciated know i am a little low going to add 120lbs salt first. great forum!
    15k, ig ,vinyle ,kitbuilt, 1hp hayward, 24 hayward sand, 2-intex swg`s, manual cleaning, leslies k2006 test kit,14x28, fiberglass steps

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    Butterfly's Avatar
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    Re: high cya

    What is your FC/CC?

    It would be helpful if you listed your pool and equipment specs in your sig.
    Info on "how to" in first article in Pool School.

    How are you testing? Pool Store, Kit (which one), strips?

    Recommended levels are in Pool School.

    Post back any q's you may have.

    btw, welcome to TFP
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: high cya

    The problem with no chlorine is that your salt chlorine generator turns off when the water hits 55 degrees to protect itself. This is done because the cold water can damage the cell when it is producing chlorine. Other than that, the salt chlorine generators are great. The good thing is that when the water is that cold, you want need to add much chlorine to keep your chlorine level sustained in the correct range. Also, try not to use too many chlorine tablets in the winter because each tablet contains 3 oz. of cyanuric acid (conditioner). This keeps it stabilized and since there isn't much evaporation or splash out of water in your pool when its that cold, it can build up the conditioner too high come swimming season. Instead, add the conditioner by adding the granular so you can control it more closely and just use liquid chlorine when your water is below 55 degrees. I hope that helps.

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