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  1. 06-21-2007 05:02 PM #17
    chem geek
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    Default Re: Pucks

    Every 1 ppm Free Chlorine (FC) you add from Cal-Hypo will increase your Calcium Hardness (CH) by 0.7 ppm, but that's not usually a problem and represents a much smaller percentage increase in typical CH levels (i.e. the 0.6 ppm increase in CYA from Trichlor out of 30 ppm CYA is 2% while the 0.7 ppm increase in CH from Cal-Hypo out of 300 ppm CH is 0.2% or one-tenth as much).

    Richard
    Last edited by chem geek; 06-21-2007 at 05:08 PM.
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