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Thread: How much bleach per day?

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    How much bleach per day?

    About how many Ppm's does a balanced pool lose in a day? I'm just wondering about how many jugs of bleach I will need to keep on hand once I get my pool all situated! My pool is 27k in full sun and will have maybe 4 kids swimming a few hours a day.....
    Jill

    28k gallon IG Vinyl Pool, 1hp Hayward 200 with Zeobrite in it, Full sun, no bottom drain, heater

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    Mod Squad jblizzle's Avatar
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    Re: How much bleach per day?

    It is dependent on your CYA level to some degree.

    But, given full sun and high use, 3-4ppm is probably not unreasonable ... if not more if they add the P to your ool.

    So I am guessing about an 182oz jug per day.
    Jason, TFP Moderator
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    Mod Squad woodyp's Avatar
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    Re: How much bleach per day?

    What jb said^^^^^^^^^^^
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    Re: How much bleach per day?

    My pool uncovered on a sunny day seems to use around 5ppm regardless of use in the heat of the summer. (obviously this is more of a minimum, with heavy use I'm sure it can go higher)
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
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    Re: How much bleach per day?

    With a CYA of 50 ppm or so, the chlorine loss from sunlight is usually around half and then there's some small overnight loss. So that would be roughly around 3 ppm of one went from 6 to 3. At 80 ppm CYA, the loss may be more like 25% so going from 8 to 6 so a loss of 2 ppm. The background loss rate (the loss not due to sunlight) is a function of temperature so higher temps have higher losses. In my own pool at 88F, I estimate that background loss at around 0.7 ppm FC per day. If you're losing 5 ppm, that seems excessive. What's your CYA level and pool temperature?
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
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    Re: How much bleach per day?

    The test looks like 60 to me, but maybe it's a bit lower. I had a CYA of around 95 last year and also lost close to 5ppm on sunny days. But at 95 I was targeting 11ppm FC and taking it up to 15-16 at night. Now at 60 I target 7, so I'm taking it up to 12 on nights before a sunny day. Oh - almost left out the temp. Lately i've been letting it hover around 90, but I usually keep it closer to 88.

    With the solar cover on it loses around 1.7ppm.

    I just figured the sun was consuming it. Maybe I need to open my sand filter and rinse it..?
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
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    Re: How much bleach per day?

    Maybe. If you run your pump overnight and find a larger chlorine loss than if you don't run it overnight, then that would probably mean there's something in the filter consuming chlorine.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Re: How much bleach per day?

    Do you think that a loss of 5ppm/day (only on sunny days) with 60ppm CYA is reason enough by itself to assume something might be wrong?
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
    Powered by: TFP, PoolMath & TFTestkits

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    Mod Squad jblizzle's Avatar
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    Re: How much bleach per day?

    That does sound a little high on the daily loss. Have you tried an OCLT to see if it shows anything growing?

    Posted with Tapatalk ... sorry if I sound short ... hate typing on phone
    Jason, TFP Moderator
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