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Thread: CYA TOO HIGH!! HELP PLEASE

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    CYA TOO HIGH!! HELP PLEASE

    I've read to lower CYA that I need to drain the pool. What exactly does draining the pool do? I'm refilling with the same water supply that gave me the problem. After draining the pool some, then what??? Just fill er' up again or do something else? Here are my numbers

    Water Temp/Time: 74/7:30pm
    FC- 0 (I know, I went a couple of day and didn't add any bleach. Normally, I keep it around 3.0)
    TC- 0
    CC- 0 (of course)
    PH- 7.6
    TA- 160
    CYA-unreadable, kit goes to 50 and no effect to the dot at all.

    18' x 52 round AG Pool with 200lb sand filter.

    Thanks for any help!!!!!!!!

    Dave S.
    18'x52" AGP, 8500 Gal(approx), Hayward 1HP -2 spd pump, 200lbs sand filter, SWG on the way, Solar Heater in the works.

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    Mod Squad JohnT's Avatar
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    CYA is an additive that makes chlorine resistant to sunlight. It does not occur naturally in water. It is found in most forms of chlorine. The CYA test clouds more quickly the more CYA you have, so it takes less liquid for high numbers. Your result seems to indicate you don't have any CYA at all.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Butterfly's Avatar
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    Hi Dave and welcome

    After getting some chlorine in the pool asap, I'd get the water tested from another source, perhaps your pool store, and post the full set of #'s.

    Also, have your fill water tested as your TA looks way high.

    On your CYA test, are you saying that the dot never disappeared?

    What test kit are you using?

    Replacing/draining the pool water is the only way to remove the CYA . (Not to say that some is not lost by backwash/splash out, etc. over time).

    Here are two stickies for now:

    "ABC's of Pool Water Chemistry" by duraleigh: http://www.troublefreepool.com/sticky.php?s=4953

    "BBB" or, "What are all these pol chemicals?" by Waterbear: http://www.troublefreepool.com/sticky.php?s=94

    Also, when you have time, please list all your pool and equipment info in your signature. This will be most helpful in members giving better advice!
    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. ~

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    Re: CYA TOO HIGH!! HELP PLEASE

    Hi, Dave,

    Welcome. Confirming the above posts, your test results indicate 0 CYA...not too much. CYA has to be added to your pool and, once there, typically does not go away.
    I'm refilling with the same water supply that gave me the problem.
    You do not tell us what the problem is. Give us a litle more info and we'll all help get you fixed up.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Thanks for the help!!!. I don't what my mind was thinking. My brain did a data dump concerning my CYA level. I'll get some stablizer tonight.

    Now for my TA. I used muriactic acid to get my PH in range and it dropped my TA as well. However, I need to get it lower. What can I use to lower the TA and not effect the PH. OR--do I use muriatic acid to lower the TA then use the baking soda to raise the PH?

    Thanks again!!!
    Dave S.
    18'x52" AGP, 8500 Gal(approx), Hayward 1HP -2 spd pump, 200lbs sand filter, SWG on the way, Solar Heater in the works.

  6. Back To Top    #6

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    To lower you TA, use acid to drop your PH to 7.0, then aerate the water to raise the PH.

    There is a sticky that discusses this. If you have a spa on your pool turning on the jets works very well.
    15,500 gal, inground gunite pool with 7 ft spa, 2 speed pump 2hp/.33hp, 3/4 hp booster pump, Intermatic P1353 timer, AutoPilot SC-48, Sand filter with ZeoBest, Heater, that I never use . . .

  7. Back To Top    #7

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    It has been running for a couple of days and our pool has balanced perfectly.

    Thanks for all the help.

    Now it's time to work on that first sunburn!!!
    18'x52" AGP, 8500 Gal(approx), Hayward 1HP -2 spd pump, 200lbs sand filter, SWG on the way, Solar Heater in the works.

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    Butterfly's Avatar
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    Congratulations!
    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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