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Thread: Poolcalc vs. CYA/Chlorine Chart for Shock Value...

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    Poolcalc vs. CYA/Chlorine Chart for Shock Value...

    A bit confused here. For CYA of 70 on SWG, one says shock level is 20, the other says 28. Which one??
    Thanks for all your help!!!!
    16,000 IG, SWG, 175 sq. ft. cartridge, 1.5 hp pump, vinyl, Charlotte NC
    TF-100, Pool School, Pool-Calc

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    Mod Squad jblizzle's Avatar
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    Re: Poolcalc vs. CYA/Chlorine Chart for Shock Value...

    The chart is more conservative with the higher shock level than the calculator. Both will work, although the higher level might be a bit faster.
    Jason, TFP Moderator
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    JasonLion's Avatar
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    Re: Poolcalc vs. CYA/Chlorine Chart for Shock Value...

    They both work. The higher level works more quickly. We recommend the higher levels because they are more trouble free.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Poolcalc vs. CYA/Chlorine Chart for Shock Value...

    I know it seems like a lot of work to get enough FC in there, but once you get there it is easier to maintain then you'd think. So the difference of 20 vs 28 is only in the upfront work.
    20K IG White Plaster - Hayward 1.5 HP Pump - Anthony DE Filter - TF100 Test Kit

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