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Thread: High CYA in new Pool

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    Join Date
    May 2015
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    port charlotte,fl
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    4

    High CYA in new Pool

    Bought our house about six month's ago with a pool that had been kept for years with tablets in a float with the pump timed to run four hours a day.Pool store testing says i have too much stabilizer and should do a partial drain which I plan to do slowly as the summer rains progress.Sounds like my problem with maintaining chlorine is CYA.Have been maintaining chlorine levels with liquid chlorine without too much of a problem until we got a rainstorm which put three inches of water in the pool after which I would add from 1 pint to 1 quart of chlorine to the pool when pump started,about noon the lever would from 2-4 ppm but the next morning no chlorine.Two days ago I added two gallon 10% chlorine and ran the pump for 28 hours.PH was 8 so added 18 oz muratic acid which brought the ph to 7.5. with the chlorine off the 5 ppm poolmaster test kit.Test kit says my ph is 8+ put with my ph meter set with proper solution and tap water testing normal i bolieve it instead of the test kit.
    I have had experience in managing water quallity in a cooling tower and thought the pool would be easy but finding it somewhat complicated.This site has been a big help in managing my pool.



    Moderator note, this was split out from this threadhttp://www.troublefreepool.com/threa...YA-in-new-Pool
    14 x 26 in ground @15,000 gallon 1 hp pump Pentair c 200 filter.

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    Richard320's Avatar
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    Re: High CYA in new Pool

    Welcome!

    High FC can react with the reagent and mess up the pH readings. Check out the pictures in this thread.

    If you have really high CYA, you'll need to maintain really high FC, and the only way to measure that accurately is with a FAS-DPD test. Test Kits Compared.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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    Mod Squad woodyp's Avatar
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    Re: High CYA in new Pool

    Welcome. I can't decide if you're asking any questions here or not!
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    Mod Squad pooldv's Avatar
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    Re: High CYA in new Pool

    Welcome to TFP!

    Any idea what your CYA level is? Chlorine level needs to be maintained in relation to CYA level, Chlorine CYA Chart.
    How do you chlorinate your pool?


    Here are some intro Pool School articles to read
    TFPC for Beginners
    ABC's of Pool Water Chemistry

    Here are the Recommended Levels for your pool.
    Here are the Recommended Pool Chemicals
    Use PoolMath to figure out how much to add.
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    Join Date
    May 2015
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    port charlotte,fl
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    4

    Re: High CYA in new Pool

    Am new at this and it is hard for me to answer questions from my own knowledge.I just did testing with my Poolmaster test kit with free chlorine 5ppm +-Ph 7.5 [with meter] and alkalinity being 90.had test done about April 1 ,lost test paper but they said cya levels were high and needed to do a couple partial drainage.Three days later had another pool store do a test which I still have with nothing out of range but a ph of 8.0 but suggester I do 1 1/2 gallon chlorine and 4 cups acid.Pool has been staying clear after clearing up some algae back in April.Had a lot of floating bugs lately after the big rain drowned the skimmer but have been getting rid of them with the scoop,pool got low enough today for the skimmer to work and they are all gone
    Have spent quite a bit of time reading post and stickies on the forum which are helpful.Looking into getting a Taylor test kit soon.
    14 x 26 in ground @15,000 gallon 1 hp pump Pentair c 200 filter.

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