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Thread: Numbers after 1st week of BBB

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    Numbers after 1st week of BBB

    Here are my numbers after 8 days of the BBB:

    FC=3.5
    CC=.5
    pH=7.6
    TA=100
    CH=130
    CYA=60

    Do I need to go ahead and add some calcium chloride to get the CH up or will it hurt to leave it as is?

    Thanks to all who helped! This BBB is definately the way to go as far as I'm concerned!

    By the way my water is almost crystal clear now after running the filter non-stop for the past 8 days.
    27' round Above ground w/sand filter
    17100 gallons calculated
    Nashville, IL

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: Numbers after 1st week of BBB

    Your CH level is just fine. Vinyl pools are fine with CH relatively low.

    Your FC level is a little low. With CYA at 60 the normal day to day FC level should be 5 to 9. Otherwise your numbers look good.
    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: Numbers after 1st week of BBB

    Yeah, my FC was prior to adding bleach. I have a target set at 7. Should I up my target to 9?
    27' round Above ground w/sand filter
    17100 gallons calculated
    Nashville, IL

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Numbers after 1st week of BBB

    Experiment with different target levels to find something that leaves FC above 5 the next day. The most appropriate target level will change as the weather changes and when more or less people are swimming in the pool.
    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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