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Thread: When to stop keeping chlorine at shock level

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    When to stop keeping chlorine at shock level

    Ive got a 20x40 inground vinyl pool that I have been opening myself the last couple years. I use the BBB method and evrntually always go from a green pool at opening to a sparkling pool. I am however still unclear of one thing. When my pool goes from green to a light blue, how long do i need to keep my chlorine levels up to shock level ? My chlorine is holding overnight and I dont seem to be using more than normal during the day. Do I keep at shock level until pool is completely clear or can I maintain normal chlorine level based on CYA at this point and just wait for the filter to do the remaining work ? Thanks

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    Re: When to stop keeping chlorine at shock level

    Quote Originally Posted by hardcoreco1
    Ive got a 20x40 inground vinyl pool that I have been opening myself the last couple years. I use the BBB method and evrntually always go from a green pool at opening to a sparkling pool. I am however still unclear of one thing. When my pool goes from green to a light blue, how long do i need to keep my chlorine levels up to shock level ? My chlorine is holding overnight and I dont seem to be using more than normal during the day. Do I keep at shock level until pool is completely clear or can I maintain normal chlorine level based on CYA at this point and just wait for the filter to do the remaining work ? Thanks
    You are done shocking when you meet the three criteria. See red info in my sig.

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    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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    Re: When to stop keeping chlorine at shock level

    Okay just to confirm. My chlorine is holding overnight and my cc is 0. My pool is a very light blue and I can see the bottom of shallow end but nothing on deep end. You are telling me I need to keep at constant shock level based on CYA until pool is totally clear correct?
    Thanks

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    Re: When to stop keeping chlorine at shock level

    Quote Originally Posted by hardcoreco1
    Okay just to confirm. My chlorine is holding overnight and my cc is 0. My pool is a very light blue and I can see the bottom of shallow end but nothing on deep end. You are telling me I need to keep at constant shock level based on CYA until pool is totally clear correct?
    Thanks
    Yep.

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    Re: When to stop keeping chlorine at shock level

    Thanks !

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    Re: When to stop keeping chlorine at shock level

    Also, keeping running that filter 24/7 until the process is complete. Filter time is so important.

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    Re: When to stop keeping chlorine at shock level

    Yes I always run my filter 24/7

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