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Thread: Shock weekly? Do I have to?

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    Shock weekly? Do I have to?

    I was reading some product descriptions (don't have them in front of me) and it said you should shock weekly with them. If I maintain FC and pH, do I need to shock weekly?
    13,500 Wilkes Vinyl AG (15'x30' rectangular)
    Hayward Power-Flo LX SP1580, 1HP
    Hayward S-160T High Rate Sand Filter

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    JasonLion's Avatar
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    Re: Shock weekly? Do I have to?

    No, as long as you maintain your levels properly there is no need to shock weekly. We recommend shocking only if FC goes to zero, if there is visible algae, or if there is obvious organic contamination of the water.

    Many places recommend weekly shocking because they assume that you are going to ignore the pool during the week and let the levels get out of range and then need things cleaned up for the weekend.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Shock weekly? Do I have to?

    I thought so. (or at least figured they were looking to sell more product.)

    The weekend is when I'll use it most. I may do an overnight FC loss test on Sunday night, just to see how hard the pool was handled. Then I could do a small shock to the pool if necessary before the wife and I go to work.
    13,500 Wilkes Vinyl AG (15'x30' rectangular)
    Hayward Power-Flo LX SP1580, 1HP
    Hayward S-160T High Rate Sand Filter

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    Re: Shock weekly? Do I have to?

    Quote Originally Posted by JasonLion
    Many places recommend weekly shocking because they assume that you are going to ignore the pool during the week and let the levels get out of range and then need things cleaned up for the weekend.
    They also recommend this frequency because this allows them to make more money off of you since you are buying lots of bags of so-called "shock".

    You will find that most who go the BBB route rarely have to shock. I have had to do it once and that was because I dropped the ball and let the FC get to zero.

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    Re: Shock weekly? Do I have to?

    You always shock when opening, tho, right?
    13,500 Wilkes Vinyl AG (15'x30' rectangular)
    Hayward Power-Flo LX SP1580, 1HP
    Hayward S-160T High Rate Sand Filter

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    Butterfly's Avatar
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    Re: Shock weekly? Do I have to?

    Quote Originally Posted by mkenyon2
    You always shock when opening, tho, right?
    Not necessarily! Just depends on your water test results
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    Re: Shock weekly? Do I have to?

    FC about 0 right now. (Still have the cover on, and the water is pretty clear.)
    13,500 Wilkes Vinyl AG (15'x30' rectangular)
    Hayward Power-Flo LX SP1580, 1HP
    Hayward S-160T High Rate Sand Filter

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    frustratedpoolmom's Avatar
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    Re: Shock weekly? Do I have to?

    Nope, haven't shocked for last three openings... haven't needed to-still had FC left from winterization.

    If your water is clear but your FC is zero, raise the FC up to your "target" for your CYA level, and then do an overnight test. If it's holding, and the CC is .5 or less, you don't need to shock.
    Helpful links: Pool School; CYA/Chlorine Chart
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    dmanb2b's Avatar
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    Re: Shock weekly? Do I have to?

    ditto...I just ran my pool rover under the winter cover and tested afterwards FC =6.5 and no CC's ...can't wait for things to warm up a bit and get that cover off.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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