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Thread: High Chlorine Demand

  1. Back To Top    #1

    Join Date
    Aug 2008
    Location
    central kansas
    Posts
    22

    High Chlorine Demand

    Pool is very clear but i think it is using too much chlorine. I have 0 combined chlorine most of the time and pass the overnight test every time i check it. I have been running the pump for 4 hours each evening after i add 2-3 96 oz. jugs of 6% aldi bleach. last night after adding 3 jugs i had a FC level of 10.5 and the same this morning. At 6 PM today i was down to 4.0 with 0 combined chlorine, no swimmers yet 75 deg sunny day. This has been the norm for my pool since i switched to BBB going on 4 years. It seems that the higher i try to keep my chlorine level the more the pool seems to use. Am i doing something wrong? Do i need to switch bleach brands or strength?

    FC 4.0
    TC 4.0
    CC 0.0
    PH 7.4
    ALK 110
    CH 130
    CYA 50
    20k inground fiberglass
    sand filter
    k-2006 test kit

  2. Back To Top    #2
    Casey's Avatar
    Join Date
    Apr 2007
    Location
    SW PA
    Posts
    10,157

    Re: High Chlorine Demand

    What is the strength you're using? How much sun does your pool get each day?
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

  3. Back To Top    #3

    Join Date
    Aug 2008
    Location
    central kansas
    Posts
    22

    Re: High Chlorine Demand

    It is 6%. i get about 10 hrs of sun a day.
    20k inground fiberglass
    sand filter
    k-2006 test kit

  4. Back To Top    #4
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: High Chlorine Demand

    FC loss is proportional to the amount of total. Raise your FC just to the top of the recommended level for your CYA, but not above. That way you're not losing any more FC than necessary.
    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

  5. Back To Top    #5

    Join Date
    Aug 2008
    Location
    central kansas
    Posts
    22

    Re: High Chlorine Demand

    I was afraid that if i did that i would loose too much and drop below my min. level. I will give that a try and check it more frequently throughout the day.
    20k inground fiberglass
    sand filter
    k-2006 test kit

  6. Back To Top    #6
    pwrstrk's Avatar
    Join Date
    Aug 2012
    Location
    Elverson Pa.
    Posts
    4,758

    Re: High Chlorine Demand

    + 1 what Bama said.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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