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Thread: Light brown deposits after shocking?

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    pool newby is offline ** No working email address ** Thread Analyst pool newby 0
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    Default Light brown deposits after shocking?

    About every two weeks , I add a bag of Cal-hypo to shock my 8600 g 18' ABG, mostly because I have several bags left over from the pool store. Normally, just use bleach to chlorinate. I premix the cal-hypo well in a bucket of water before adding, and continue mixing the settled portion until its all mixed well. Of course, the water clouds up for a day. However, always on the following day, I have several little deposits of light brown residue all over the pool, that I vacuum up. If this is cal-hypo, why is now brown , instead of white? Could it be something else, like algae, even though I've had no signs of algae before ?

    thanks


    Bob P
    pool newby
    8600g, 18', Pacifica, 26" High rite sand filter, 2.5 hp two speed pump

  2. #2
    mbar's Avatar
    mbar is offline Lifetime Member Whizbang Spinner mbar 3 stars mbar 3 stars mbar 3 stars mbar 3 stars
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    Default Re: Light brown deposits after shocking?

    If you post some of your numbers:
    Free Chlorine
    Combined Chlorine
    PH
    Alkalinity
    Calcium
    CYA

    When we see where your water is, we can help determine what is going on.
    Northeast PA
    16'x32' kidney 16K gal IG fiberglass pool; Bleach; Hayward 200lb sand filter; Hayward pump; 24hrs; Pf200; well; summer: none; winter: mesh; ; PF:7.5

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