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Thread: percentages for the pool calculator

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    percentages for the pool calculator

    Hi,
    I'm going to add bleach in order to raise my fc level to 7 per the Pool School, based on my cya, but i'm confused at to what numbers to put in the percentage cell on the Pool Calculator for the bleach. do i add the percentage of Sodium Hypochlorite listed on the label or the percentage of available chlorine listed?
    ph- 7.6
    fc- 3.5
    cc- 0
    ta- 100
    ch- 380
    cya- 60

    used the taylor K-2006 for totals
    24' x 52' Round AG 11,200 gal., 2 HP pump Cartridge Filter

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    Mod Squad zea3's Avatar
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    Re: percentages for the pool calculator

    Go with the percentage listed on the label.
    TFP Moderator
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    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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    JasonLion's Avatar
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    Re: percentages for the pool calculator

    In all cases you use the most common number that the product is normally labeled with.

    Use the by weight percentage for bleach (which is the primary number shown on the package) when below 10% strength.

    For liquid chlorine, 10% or higher, use the trade percentage, which is how liquid chlorine is normally labeled and sold.

    By the by, with CYA at 60, you never want to allow FC to get below 5 (unless you have a SWG).
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: percentages for the pool calculator

    thanks,, but still confused... this is what the label says

    Active ingredient:
    Sodium Hypochlorite.......8.25%
    Other Ingredients..........91.75%
    Total..........................100.00%
    Yields 7.86% of Available Chlorine

    this is a 3.78 QT( 121 fl oz)3.57L container

    do i put the 8.25% or the 7.86% in the Pool Calculator?
    24' x 52' Round AG 11,200 gal., 2 HP pump Cartridge Filter

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    Re: percentages for the pool calculator

    oh and if i check my chlorine totals in the daytime and it needs bleach should i wait until dusk or add right then?
    24' x 52' Round AG 11,200 gal., 2 HP pump Cartridge Filter

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    Join Date
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    Re: percentages for the pool calculator

    use 8.25%.

    Put it in the cell in between "of" and "% bleach".


    When you SLAM, you need to test as often as possible, once an hour or so....and redose to SLAM level each time.
    8,000 gallon, in ground, fiberglass pool with a cartridge filter.

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    Re: percentages for the pool calculator

    thanks
    24' x 52' Round AG 11,200 gal., 2 HP pump Cartridge Filter

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    Jeetyet's Avatar
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    Re: percentages for the pool calculator

    Quote Originally Posted by JasonLion
    In all cases you use the most common number that the product is normally labeled with.

    Use the by weight percentage for bleach (which is the primary number shown on the package) when below 10% strength.

    For liquid chlorine, 10% or higher, use the trade percentage, which is how liquid chlorine is normally labeled and sold.

    By the by, with CYA at 60, you never want to allow FC to get below 5 (unless you have a SWG).
    Okay, perhaps a dumb question. This is the second time I've seen someone mention the liquid bleach percentage is by weight, but aren't all the containers labeled by volume? If so aren't all the formulas used for amounts to add wrong or do they actually accomodate for this in the math?
    "The early bird might get the worm, but its the second mouse that gets the cheese." ~ W. Rian Adams
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    Relative's IG Vinyl | 16x32 | ~18,600 gals | Hayward 3/4hp Pump | Hayward S244T Filter | Pentair Model 300 Chlorinator (not used) | Polaris 180

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    JasonLion's Avatar
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    Re: percentages for the pool calculator

    You are over thinking it. The two measurements are unrelated to each other, so it doesn't make any difference that they are in different units. All of the calculators have already taken the various units into account, so they will not cause any problems.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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