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Thread: Grand opening low cya

  1. Back To Top    #1

    Join Date
    Jun 2013
    Northern NJ

    Grand opening low cya

    Hi all and happy summer season. I started tfp at mid season last year. At pool closing my cya level was 180. All winter I had nightmares about opening this spring and having to drain about47% of the pool. But over the winter the cya dropped to 30. Wow can't believe it! Has anyone experienced this? I was told by forum last year that I would have to drain to get the cya lower. Lucky or what?

    39,000 ig vinyl chlorine bleach borax and baking soda
    36,000 gal IG vinyl. Haywood pump and heater Hayward DE filter blue diamond robot. Hayward Aqua Rite SWG AQR-15

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

    Re: Grand opening low cya

    Hopefully that CYA drop was due to rain and snow dilution, and not conversion into ammonia. That has happened a lot this year for some reason. Is the pool holding chlorine okay?
    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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