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Thread: free chlorine problem

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    Join Date
    May 2014

    free chlorine problem

    New here. 22000 gallon. IG vinyl. Ph is low 6.6. I have put in 40 gallons of liquid shock in the past 2 days. Still no free chlorine. Total chlorine of 15. Anyone ever have this happen. Stabalizer is 50. Had the pool for 7 yrs with no problems until this year.

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    Smykowski's Avatar
    Join Date
    Sep 2011
    Gurnee, IL (North Suburban Chi-town)

    Re: free chlorine problem


    How are you testing?
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Casey's Avatar
    Join Date
    Apr 2007
    SW PA

    Re: free chlorine problem

    If your pH is that low? you need stop adding chlorine and let it come down and bring pH up ASAP! As asked above... how are you testing?
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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    Mod Squad woodyp's Avatar
    Join Date
    Apr 2010
    East Texas

    Re: free chlorine problem

    What kind of "liquid shock"? Welcome to the forum.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: free chlorine problem

    Welcome to TFP!
    Sounds like a big ammonia problem. Many threads about this recently.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: free chlorine problem

    Yes, this is a known issue. It happens occasionally when CYA vanishes over the winter and is turned into ammonia. It takes fairly large amounts of chlorine to burn off the ammonia.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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