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Thread: How much CYA in a Puck?

  1. Back To Top    #1

    Join Date
    Apr 2007

    How much CYA in a Puck?

    How much CYA will a 3" Tri-Chlor puck add to say 10,000 gallons of pool water?
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  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD
    Trichlor adds 0.6 ppm of CYA for each 1 ppm of chlorine. The absolute quantities depend on the size of the puck (they seem to come in 6, 7, and 8 oz sizes).
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  3. Back To Top    #3

    Join Date
    Mar 2007
    San Rafael, CA USA
    This is correct. An 8-ounce puck in 10,000 gallons will increase FC by 5.48 ppm and CYA by 3.33 ppm. The 6 and 7 ounce pucks will add proportionately less.
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