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Thread: Shocking hot tub for combined chlorine levels

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    Join Date
    Feb 2017
    Durand/ MI

    Shocking hot tub for combined chlorine levels

    From what I have read I should have my pump run continuously when adding chlorine bleach to lower my combined chlorine level to 0.5 or lower. However, my pump (jets) automatically turn off after @ 20 minutes unless heating. Do I have another method available? Should I let the water cool down and then try shocking? Hot tub is indoors and CYA is 30.Thanks for any advice.
    Softtub 140 gallon vinyl hot tub, @7 years old, located in basement,

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    JoyfulNoise's Avatar
    Join Date
    May 2015
    Tucson, AZ

    Re: Shocking hot tub for combined chlorine levels

    Does the tub have only one pump for jets and recirculation? It's best to run it, but the chlorine will work fine on CCs even if the water is not moving. The chlorine will convert the CCs into volatile compounds that outgas from the water so try to leave the cover off for a few hours if you can.
    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

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