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Thread: Pool is not losing Chlorine?

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    Join Date
    Jul 2014

    Pool is not losing Chlorine?

    Hi everyone, my pool has not needed chlorine for the past 2 days. Is this normal? It has been about 65 degrees and cloudy, and at night going down to the 50's. All my numbers have been great. Was having trouble getting my CYA up, but got I up slowly and its good now. Just want to make sure that its normal. Thanks!
    5,700 gallon, Carribean Isle 15x52 Round Above Pool.
    Cartridge Filter.
    Installed Fall, 2014.
    North New Jersey
    Using the TF100 test

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Pool is not losing Chlorine?

    That is a little on the unusual side, but not unheard of.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3
    Isaac-1's Avatar
    Join Date
    May 2010
    SW Louisiana

    Re: Pool is not losing Chlorine?

    What is your water temperature, algae, etc. grows slower in cold water, combine low water temperature with possible low sun exposure and you get low FC consumption
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from
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  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Pool is not losing Chlorine?

    Gloomy days really slow down chlorine loss.

    Two questions: 1) are you testing it using colormatching or FAS-DPD; 2) Are you using pucks to chlorinate?
    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.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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