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Thread: Bleach frequency question

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    Join Date
    Jun 2015
    Location
    St. Francisville
    Posts
    78

    Bleach frequency question

    CYA: 50-60
    pH: 7.6
    FC: 6
    CC: 0

    My pool gets all day sun. Hot, humid gulf coast sun. I find that I'm having to add a gallon of 8.25% bleach daily. Is this normal? I do not chlorinate with any other methods other than bleach. If I forget to add, FC drops by 2-3ppm daily.
    30k gal, IG, vinyl, Pentair Tagelus TA 60D sand

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    TFP Guide


    Join Date
    Feb 2015
    Location
    Chandler AZ
    Posts
    744

    Re: Bleach frequency question

    With a CYA of 60 (always round the CYA reading up), your minimum FC is 5. If you notice it going below 5, target a number higher than 7 - say 8 or 9. A gallon (or is it 121oz only??) of 8.25% per day in a 30k gallon pool is pretty normal. FC drops of 2-4 per day is quite normal this time of year.

    Please add your state to your location.... over there <<<---------- so it shows up. Most don't that St. Francisville is in LA. This will make it easier to provide more accurate information based on your location.
    Gene
    ​12,300 gal IG play pool - Pebbletec - built 10/1999 || Hayward S360SX 36" sand filter || Hayward Ecostar SP3400 VSP || A&A In-Floor cleaning system || Quik Water Leveler || Quik Dek-clor (limited use)
    TF-100 testkit / Speedstir - A good test kit is not an expense, it's an investment

  3. Back To Top    #3

    Join Date
    Jun 2015
    Location
    St. Francisville
    Posts
    78

    Re: Bleach frequency question

    Thanks! And yes it is the 121 oz. hard to be exact with the CYA reading test. You add the drops till the black vial dot "just disappears". Is there a better CYA test available? I'm probably closer to 50 based on this test but hard to be exact.
    30k gal, IG, vinyl, Pentair Tagelus TA 60D sand

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