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Thread: Question On Adding Chlorine After Opening

  1. Back To Top    #1

    Join Date
    Mar 2013

    Question On Adding Chlorine After Opening

    I'm going to be opening my pool in a few weeks. This is only my 3rd season so I'm still learning. Love this site!.

    Last year I tested the water & started adding chemicals the second my cover came off. I know now that I need to run the pump for a day or two before I can get truly accurate readings.

    Even knowing that - Should I just assume that the chlorine level is at zero and add some chlorine (I use bleach) right after I take the cover off??? It just doesn't feel right to me to pull the cover and not add ANY chlorine for a day or two while the pump is circulating the water.

    If the answer is yes - how much do I need to add if I can't accurately determine the CYA level the second the cover comes off??

    16 x 32 In-Ground vinyl, 21,000 Gallons, Hayward Cartridge Filter, Hayward Tiger Shark robotic cleaner, Taylor K-2006 Test Kit

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Question On Adding Chlorine After Opening

    It shouldn't take days to mix the water. Run the pump for an hour and brush the pool to set up some crosscurrents and that ought to be enough to get a rough idea of where your chemistry is. pH and FC first. Worry about fine tuning until you're sure it's all mixed.
    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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