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Thread: Bleach % Question

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    Mr. Blue's Avatar
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    Bleach % Question

    So I have been getting interested the the BBB method. I checked out the Pool Calculator and downloaded the iPhone app today.

    I decided to run over to my grocery store to check prices on bleach, borax, etc. All of the bleach I found (went to multiple stores) was 8.25%. I notice on the Pool Calculator that you can enter any value into the % bleach field, yet in the iPhone app, there are only a few options to choose from...8% being the highest. Now I suspect it could just be an issue with the app, as the last time it was updated was 2011 , but I wanted to make sure I wasn't getting confused here.

    Any thoughts?
    23K Gallon Freeform Tile Inground
    Hayward Super II 1.5 HP -- Pentair FNSP48 DE Filter @ 120 GPM
    Polaris 3900 Sport (with Booster Pump)


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    pwrstrk's Avatar
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    Re: Bleach % Question

    It shouldn't make a difference.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Mr. Blue's Avatar
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    Re: Bleach % Question

    It shouldn't make a difference as in use 8% for the calculation, even if the bleach I am using is 8.25%?
    23K Gallon Freeform Tile Inground
    Hayward Super II 1.5 HP -- Pentair FNSP48 DE Filter @ 120 GPM
    Polaris 3900 Sport (with Booster Pump)


    Pool School Attendee -- The TF-100 Test Kit and the Pool Calculator keep my pool Trouble Free -- BBB Supporter

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    frustratedpoolmom's Avatar
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    Re: Bleach % Question

    nope close enough not to worry. Hopefully they'll fix it so there's no confusion.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
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    JasonLion's Avatar
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    Re: Bleach % Question

    Correct. The difference between 8% and 8.25% is significantly smaller than the error in test results, the error in measuring the amount of bleach added, and error in figuring out what % the bleach actually is compared to what it is labeled. Between the various sources of error, you will never notice a 0.25% either way.
    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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    pwrstrk's Avatar
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    Re: Bleach % Question

    I've done it that way with the phone app with no problems. You can always use the pool calc. com.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Mr. Blue's Avatar
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    Re: Bleach % Question

    Good to know. Thanks, everyone.

    Not holding my breath for an update to add iPhone 5 app support either.
    23K Gallon Freeform Tile Inground
    Hayward Super II 1.5 HP -- Pentair FNSP48 DE Filter @ 120 GPM
    Polaris 3900 Sport (with Booster Pump)


    Pool School Attendee -- The TF-100 Test Kit and the Pool Calculator keep my pool Trouble Free -- BBB Supporter

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    Re: Bleach % Question

    I too have found 8.25% bleach in the store today. Walmart great value brand of all things. Anyone have any info on why the sudden increase in yield? It reeks of bad information to me, but I am skeptical of most good news.
    Doughboy 18x38 AGP buried 2' deep. 18,400 gal. Hayward Power Flo Matrix. Hayward Pro Series High Rate Sand Filter. TF-100 test kit.

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    Mod Squad jblizzle's Avatar
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    Re: Bleach % Question

    Cheaper to ship to the stores because it ways less. In reality the new 8.25% also has slightly less total chlorine for the same price since the volume went down more than the % went up.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Mr. Blue's Avatar
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    Re: Bleach % Question

    Hmm. I did notice a line that said: Yields 7.85% available chlorine.

    Photo: http://i.imgur.com/Q6NiO59.jpg
    23K Gallon Freeform Tile Inground
    Hayward Super II 1.5 HP -- Pentair FNSP48 DE Filter @ 120 GPM
    Polaris 3900 Sport (with Booster Pump)


    Pool School Attendee -- The TF-100 Test Kit and the Pool Calculator keep my pool Trouble Free -- BBB Supporter

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    JasonLion's Avatar
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    Re: Bleach % Question

    The by weight percentage, i.e. 8.25%, is what we use around here. The available chlorine number is always lower and should be ignored (unless you are into advanced chemistry).
    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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    Mr. Blue's Avatar
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    Re: Bleach % Question

    I see, kind of what I was thinking. Not quite into advanced chemistry...just enough to keep my pool sparkling.
    23K Gallon Freeform Tile Inground
    Hayward Super II 1.5 HP -- Pentair FNSP48 DE Filter @ 120 GPM
    Polaris 3900 Sport (with Booster Pump)


    Pool School Attendee -- The TF-100 Test Kit and the Pool Calculator keep my pool Trouble Free -- BBB Supporter

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