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Thread: I thought they knew the answers to water problems

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  1. #1
    mbeauman is offline ** No working email address ** mbeauman 0
    Join Date
    Jun 2006
    Posts
    3

    Default Re: I thought they knew the answers to water problems

    I am still confused by the whole shock treatment thing. Should i add another bag of shock?
    How do i test my free chlorine if the chlorine is bleaching out the test strips?

  2. #2
    Join Date
    May 2006
    Location
    Downingtown, PA
    Posts
    192

    Default Re: I thought they knew the answers to water problems

    The pool store loves to confuse the issue of 'shock'. I don't want to steal this phrase but I don't know who deserves credit - 'Shock is a verb not a noun'. You can shock the pool by adding enough chlorine to reach the 'shock' level for your CYA (stablizer) level. Each gallon of chlorine adds 5.25ppm to 10,000 gallons for 5.25% regular bleach. Use Michael's BleachCalc (search for it) for dosages or with ~5000 gallons just divide in half. Below is the Ben's Best Guess CYA chart that shows the recommended levels of FC and recommended shock levels. Also, for now you either have to take results to a pool store (just don't do anything or buy anything they recommend) or dilute your sample. But diluting with a test strip might be less accurate than me guessing your chlorine level right now. You really should buy a drop-based test kit either from L's, Walmart, www.poolsolutions.com, etc because that will give you more accurate results.


    Use the info in this chart to help you figure out what levels of chlorine you need to maintain in your pool based on the amount of CYA (cyanuric acid, also called stabilizer) that you have in your pool. (FC = free chlorine)

    Stabilizer . . . . . . Min. FC . . . . Max FC . . . 'Shock' FC
    => 0 ppm . . . . . . . 1 ppm . . . . . 3 ppm . . . . 10 ppm
    => 10 - 20 ppm . . . . 2 ppm . . . . . 5 ppm . . . . 12 ppm
    => 30 - 50 ppm . . . . 3 ppm . . . . . 6 ppm . . . . 15 ppm
    => 60 - 90 ppm . . . . 5 ppm . . . . . 10 ppm . . .. 20 ppm
    => 100 - 200 ppm . . . 8 ppm . . . . . 15 ppm . . .. 25 ppm
    Last edited by Bleach=Chlorine?; 06-15-2006 at 12:25 PM.
    Outside of Philadelphia, PA
    18' x 40' IG - 22K gallons
    Sylvan Gunite Pool (1979)
    Plaster re-done (1997)
    48 Sq Ft Hayward D.E. Filter (2003)
    1.5 hp Hayward Super Pump (2006)

  3. #3
    Join Date
    Jun 2006
    Location
    Middle Missouri
    Posts
    79

    Default Re: I thought they knew the answers to water problems

    Marji, I hope it didn't take you as long as it took me to find this forum. You will get help here!

    Go to http://www.poolsolutions.com/sitemap.html#links, then to Table of Contents. Select Swimming Pool Info (free) / Things Your Pool Dealer Won't Tell You, Read Tips 1 through 10, then read More Tips. Its great stuff.

    - Jim
    Last edited by cheshamjim; 06-15-2006 at 12:35 PM.
    Jim
    16' x 32' / 15,400 gal / IG vinyl
    All testing done with
    PS234 test kit

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