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Thread: No chlorine 12 bags of shock later

  1. Back To Top    #1

    Join Date
    Jul 2016
    Tewskbury MA

    No chlorine 12 bags of shock later

    We have a 23,000 gallon gunite pool. It is 12 years old. We live near Boston. The last three years we have been fighting a losing battle with the chlorine level. We only get a reading the day after weekly shocking. The last two years we started getting pink staining on the walls. We found out it was copper staining from the water. We treated that and still no chlorine.

    Yesterday we had the water tested and they told us our nitrates are high. Sent us home with a box of shock, which we put in last night and today I tested and the chlorine is non-existent.

    Any ideas what we should do to get the chlorine level to come up? Thanks.

    Yesterday's numbers were:

    Free chlorine 1 but when I test I get nothing.
    Total Available Chlorine 1
    CH 220
    CYA 60 (this was originally 90)
    TA 110
    pH 7.6
    Copper .3
    Iron 0
    Total Dissolved Solids 1000
    Phosphates 0

  2. Back To Top    #2
    TheBraLady's Avatar
    Join Date
    Jun 2015
    Concord, NC

    Re: No chlorine 12 bags of shock later

    How are you testing your water? The pros will be along soon I'm sure but while you're waiting take a look at the pool school link. You'll need to decide whether or not you want to take care of the pool yourself or rely on the pool store. If you try to use both you will drive yourself crazy!
    Pool Completed 8/2015 18'x36' Gemini shape 3.5' - 8', 19,200 gal IG vinyl, Hayward Max-Flo 1.5 HP 2-speed pump, Hayward Pro Series 300-lb sand filter, Hayward AquaPlus SWG, NO Autofill, Dolphin M400 robot, Taylor 2005 test kit, 434 gal Bullfrog A7L spa

  3. Back To Top    #3
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    SW Indiana

    Re: No chlorine 12 bags of shock later

    Welcome to TFP!

    How do you chlorinate your pool?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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