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Thread: Lower Chlorine with UV light?

  1. Back To Top    #1

    Join Date
    Apr 2011
    Phoenix Arizona

    Lower Chlorine with UV light?

    I have seen on many UV light sites that they claim you can run with 0.5 ppm chlorine residual chlorine in the pool if you use their UV light. What do the experts here think?

    If I had to guess I would say it is not recommended. If it were true wouldn't we be able to run a SWG pool at 0.5, since the water passes through the cell that has the high concentration?

    Thanks for the advice!
    1) 11,000 gallons
    2) Hayward Sta Clear C17502 cartridge filter (175 sq ft) 125 GPM rating
    3) In Ground w/2"plumbing
    4) Pebble-Sheen finish
    5) 1.0 HP (1.5 with SF) Hayward Super Pump (runs at 10 psi at the filter)

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Lower Chlorine with UV light?

    Correct, UV doesn't help you run at a lower FC level. UV is best at eliminating CC, which really isn't much of an issue for a residential outdoor pool. UV is most effective on indoor or public pools. While UV can kill algae passing through the plumbing, this does hardly anything to help fight algae in the pool.
    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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