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Thread: Help!! Odor (like chlorine) smell that makes you cough

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    Help!! Odor (like chlorine) smell that makes you cough

    We have an outdoor/in-ground pool, chlorine based and experience the coughing anytime splashing takes place, which is almost all of the time.
    This started last season, the third since the pool was built. I believe it is the CYA (150 reading) and dont know how to lower it besides draining 50% of the volume. Suggestions? other readings are: FC 1.5 CC 3, hardness 100. I've owned inground pools for almost 15 years and never had this puzzling problem.

    23000g IG Vinyl
    Hayward SP-125-JS
    Jacuzzi MFM24 Sand Filter

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    frustratedpoolmom's Avatar
    Join Date
    May 2007
    SWSuburban Chicago, IL

    Re: Help!! Odor (like chlorine) smell that makes you cough

    Hi - I split off your post to form your own topic.

    IF your CYA is 150 then yes, you need to lower the level through water replacement. Otherwise if Reverse Osmosis is in your area you can try that. Your CC is 3 that is certainly part of the problem.

    You need to get down into the 50-70 range for your CYA to be able to properly shock the pool. Do you have your own test kit?
    Helpful links: Pool School; CYA/Chlorine Chart
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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Help!! Odor (like chlorine) smell that makes you cough

    Welcome to TFP!

    The coughing is from the CC. To remove the CC you need to shock the pool, which is going to be very difficult to do correctly unless you bring the CYA level down dramatically.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Butterfly's Avatar
    Join Date
    May 2007
    South Carolina

    Re: Help!! Odor (like chlorine) smell that makes you cough

    Your CYA may indeed be higher than 150 as most tests loose accuracy around 100.

    Water replacement or RO.

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    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Help!! Odor (like chlorine) smell that makes you cough

    It seems to be unanimous!

    It would be helpful knowing a little more about you and your pool. If you're in SoCal or Phoenix, we know that R/O is available, and can tell you who to call.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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