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Thread: Winter Time Chlorine Levels

  1. Back To Top    #1

    Join Date
    May 2013
    Egg Harbor Twp, NJ

    Winter Time Chlorine Levels

    I had some calcium scaling issues last year when I opened my pool due to a rising pH in the pool while it was winterized (I'm in NJ). So, this winter I've been checking my pH every few weeks and adding acid as needed to try to avoid the scaling issues again.

    Anyway, when I checked the other day, I decided to also check the chlorine level. I was surprised to get a reading of 0! This was just the quick 5 drop test for chlorine, not the full TFT-100 test.

    Is a reading of 0 chlorine over the winter normal? Is it something to be concerned about? If needed, is there anyway to adjust it over the winter time, or do I basically just wait at this point for spring time to come and see what's awaiting me when I open it?

    Thanks for any help!
    25,000 gallon IG gunite pool with Diamondbrite finish built May, 2012
    All Pentair equipment:
    FNS Plus 48 sq. ft. DE Filter, 1 HP SuperFlo Pump, IntelliChlor IC40 SWG, MasterTemp 400k BTU/HR Heater, Prowler 820 Vacuum
    Test Kit - TF-100

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: Winter Time Chlorine Levels

    If you can circulate in order to add acid, you can do the same in order to add chlorine. I wouldn't worry too much about it, but I hate to see zero FC at any time.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  3. Back To Top    #3
    Mod Squad Patrick_B's Avatar
    Join Date
    Jun 2011

    Re: Winter Time Chlorine Levels

    It shouldn't be a surprise however. Chlorine is consumed year round, just a slower pace in winter time.
    TFP Moderator
    Essential Links:
    TF-100 Test Kit, ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Flagstone, 36"SF, Pentair VS Pump, EasyTouch W/Remote, Rheem 400KBTU Htr

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