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Thread: CYA reading at shock level

  1. Back To Top    #1

    Join Date
    Aug 2007

    CYA reading at shock level

    Is the CYA reading while at shock level accurate? I mysteriously have a cya reading much lower than I should and was wondering if that has been affected by the high level of chlorine I've had the last 3 days.
    24' AGP vinyl, 3/4hp Pentair 2-speed, Pentair Quad DE 60
    Pool Rover Jr.

  2. Back To Top    #2

    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: CYA reading at shock level

    Yes, that is possible since the chlorine bound to CYA is probably preventing the measurement of that bound CYA in the CYA test. Try adding drops of chlorine neutralizer (R-0007) at the rate of one drop for every 5 ppm FC to your water sample (and mix thoroughly) before adding the CYA reagent. Let us know if this makes a difference in your result.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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