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Thread: Overnight chlorine test + UV light

  1. Back To Top    #1

    Join Date
    Feb 2017
    Location
    Pennsylvania
    Posts
    5

    Overnight chlorine test + UV light

    I was lax a couple of days in giving the daily Clorox to my indoor swim spa. I noticed yesterday that my pool water appeared more cloudy. I raised my FC to 10 ppm just before sleeping (CYA at 20). In the morning my FC reading was 6 ppm. The guidelines only allow no more than a 1 ppm drop overnight. However, I have a UV light. UV light may possible accerelate the degradation of chlorine. Should I still use the 1 ppm guideline if I have UV light? Thanks.
    indoor 7x12 Endless pool (2500 gallons)
    vinyl liner, inline UV bulb, automatic retractable cover

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    JoyfulNoise's Avatar
    Join Date
    May 2015
    Location
    Tucson, AZ
    Posts
    14,085

    Re: Overnight chlorine test + UV light

    Can you turn off the UV light and run the test again?
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

  3. Back To Top    #3

    Join Date
    Feb 2017
    Location
    Pennsylvania
    Posts
    5

    Re: Overnight chlorine test + UV light

    Good idea. Let me try that tonight. Thanks.
    indoor 7x12 Endless pool (2500 gallons)
    vinyl liner, inline UV bulb, automatic retractable cover

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