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Thread: How much liquid chlorine to shock pool

  1. #1
    Join Date
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    Default How much liquid chlorine to shock pool

    Hi. I have an 18 x 38 vinyl liner pool. About 31000 gallons. Hayward sand filter and heat pump. Opened the pool yesterday. Cloudy but blue. Using the Taylor k-2006 test kit I am getting the following results:
    FC .6
    CC .1
    Ph 7
    All 120
    Cya 120
    Can anyone help me get to shock level? I am using 12.5% liquid chlorine. Am I right like I should never let the FC fall below 8? Thank you so much for your time. I love this forum.

  2. #2
    BigDave's Avatar
    BigDave is offline Lifetime Member Whizbang Spinner BigDave 3 stars BigDave 3 stars BigDave 3 stars
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    Default Re: How much liquid chlorine to shock pool

    Right, according to Ben's Best Guess Chart, with a CYA of 120 you'll need to keep the FC between 8 and 15 - never below 8, shock level is 25. About 6 gallons of 12.5% should get you there.
    12'x24' oval 7.7K gal AG vinyl pool; ; Hayward S270T sand filter; Hayward EcoStar SP3400VSP pump; hrs; K-2006; PF:16

  3. #3
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    Default Re: How much liquid chlorine to shock pool

    Thank you very much!

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