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Thread: Reccomended CYA level

  1. Back To Top    #1

    Join Date
    Jun 2014
    Northern CA

    Reccomended CYA level

    This is my first year with TFP, so far kickin butt too. Past years I have had low chlorine levels that are non-responsive to shock etc, along with algae in the later season. I know know that my problem was the use of triclor tabs and the (I assume) super high CYA levels that result and so on..
    So I found this site, bought a test kit and followed the instructions taught by the experts here. My pool drank something like 16+ gallons of 10% bleach before FC would even register on a test (unofficial diagnosis of ammonia problem), SLAMmed for 3 days and finally this morning had an overnight FC loss of 0. Pool looks great!

    test results this evening:
    FC 8 (was 16 this morning)
    CC 0
    CYA low 30's
    TA 110
    ph 7.2

    I realize PH needs to come up, however what is best to do so without raising TA too high and how high is tolerable for TA before I should be concerned?
    My FC loss for today is 8. My pool is full sun all day. Should I raise my CYA to help hold more FC due to high sun loss? if so how high to take it?

    Other than that my pool is looking great. Thanks to everyone, this site is awesome.
    12000 gallon 16x32 Doughboy, 500 sq ft cartridge filter with 1hp pentair pump.

  2. Back To Top    #2
    Mod Squad zea3's Avatar
    Join Date
    Jul 2009
    Houston, Texas

    Re: Reccomended CYA level

    Your pH is fine where it is but if you want to bring it up you can point the return so the water breaks the surface of the pool. This aerates the pool and will drive pH up. Running a pool fountain will do the same thing.
    TFP Moderator
    Helpful links: TF Test Kits,TFP Pool School, PoolMath
    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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  3. Back To Top    #3

    Join Date
    May 2013
    Bay City, Michigan

    Re: Reccomended CYA level

    How do they word it? Chlorine loss is not linear based, so you will lose more fc in a day starting with 16 as opposed to starting with 8. I would still think being in CA it would be recommended to raise your CYA. If you want a number, 50 is a good number and see how that goes when maintaining a minimum of 4 fc
    12500 gallons, 24 foot round above ground
    Hayward Sand filter, Pentair OptiFlo 1HP 2-Speed pump

  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Reccomended CYA level

    A bunch of kids splashing will take care of aeration and pH raising.

    CYA probably should be in the 40 range, which leaves you some room to use pucks if you leave town for a few days.
    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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