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Thread: Does rain water dilute chlorine?

  1. Back To Top    #1

    Join Date
    May 2014
    Saint Albans, WV

    Does rain water dilute chlorine?

    We've had a lot of rain lately and it seems like my chlorine levels get lower faster when it rains. Coincidence?
    10.4K gallon 21' round Elixir AG
    Hayward 150lb Sand Filter/1.5 Hayward Pump/Hayward Diver Dave cleaner
    Pool installed 7/11/14. TF-100 Test Kit.

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Does rain water dilute chlorine?

    Huge amounts of rain can. If your pool is 4' deep and you get 6" of rain, that's 1/8 water replacement without 1/8 more chlorine added, so FC would go down 12.5%
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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