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Thread: What should my shock level be?

  1. Back To Top    #1
    Bob47's Avatar
    Join Date
    May 2010
    Baltimore, MD

    What should my shock level be?

    Thanks to this site I've had a trouble free pool all season. It's been clear and sparkly all summer. I'm starting to think about what to do to close it up in when the time comes. I read Pool School and need to know what level of FC I need to shock the pool before buttoning everything up. Per JasonLion's advice I've kept FC between 4 and 8 all season and it has worked perfectly. I'm hoping the winter drain will get the CYA down to a good level for next year.

    Can anyone advise me what a good shock level is for my pool? Also, are any of those winterizing chemicals at the pool store necessary? Pool School doesn't mention anything so I'm thinking about not using any this winter.

    FC = 5.5
    CC = 0
    TC = 5.5
    PH = 7.5
    TA = 130
    CH = 60
    CYA = 50
    Baltimore, MD
    5300 Gal, 15' Round AG, Vinyl, 1.5hp pump, Cartridge Filter

  2. Back To Top    #2
    dmanb2b's Avatar
    Join Date
    Apr 2009

    Re: What should my shock level be?

    With CYA around 50, you shock level is about 20. You can use polyquat 60 at pool closing but it is optional and only needed if you plan on closing the pool early or opening late next season.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

  3. Back To Top    #3
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: What should my shock level be?

    I'll just echo what Dman says for confirmation.

    I may try the Polyquat this year because it gets pretty warm on some days during the winter around here, but in Md. you won't need it unless like Dman said you plan on closing early or opening late.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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