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Thread: Should I add 11 gallons of bleach

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    Should I add 11 gallons of bleach

    So I have sparkling clear water but can see a little green on parts of the walls and floor. I brushed it two days ago and filter it, but it's back. Here are my numbers with my new t100 testing kit.

    FC: 5, CC: 0, TA: 5, PH: 7.2 - 7.5, TA: 110, CH 300, CYA: 60, Plaster 35K Pool

    The pool calculator says I should add just over 11 gallons of bleach. Should I do this? When should I let swimming begin again?

    I'm new to the BBB method but love everything about it. Please help me learn more. Thanks... Dan

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    dmanb2b's Avatar
    Join Date
    Apr 2009

    Re: Should I add 11 gallons of bleach

    Welcome to TFP

    Although your #'s and lack of CCs would not indicate a need to shock, you may want to bump up the FC a few (2-3) ppm first and perform an overnight FC loss test. This will help you confirm whether you need to shock or if it may be a circulation issue.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

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    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Should I add 11 gallons of bleach

    Like dman, I suggest you elevate the FC up to around 8 maybe even 10ppm and then hold it up there until all traces of algae are gone. I would also suggest someone get in the pool with a deck brush and brush the green areas.....that'll expose them to the chlorine and kill them.

    If there are too many to brush, you need to begin the shock process and still brush as much as you can.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Should I add 11 gallons of bleach

    I took the FC up to 10 and did the brushing. Pool looked very good this morning with no FC loss. I'll check it again at the end of the day. Thanks for all the help.

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