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Thread: adding bleach to pool

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    adding bleach to pool

    I just had my brick edging and tile cleaned. The guy who did this told me that to remove stains in my pool I should add 15 gallons of Clorox bleach to the pool and let the filter run overnight. This doesn't sound right to me. Would this do any good? or harm? Thanks.
    Above ground 15' x 30' oval - 52" deep
    Jacuzzi Sand Filter (not sure of size)
    2.5 hp off-brand pump 2-speed

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    reebok's Avatar
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    Re: adding bleach to pool

    well if it's organic stains...
    I think you missed this:
    pool-school/read_before_you_post
    16x32 21,000 gallon in-ground exposed aggregate, 1.5hp pump, 120 sqft catridge filter, birdcage, solar panels, aquavac tigershark qc robot.

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    duraleigh's Avatar
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    Re: adding bleach to pool

    Welcome to the forum. You have some reading to do up in Pool School.

    Bleach is what we recommend to maintain a pool!

    What caused the stains?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: adding bleach to pool

    Did a lot of reading, didn't find anything that answered my question. Would this harm my pool? Or would it actually help?
    I realize it could help under the right conditions, but I still never read anything where anyone added 15 gallons of bleach to their pool. This seems excessive to me and could be very detremental wheather the pool is vinal or plaster like mine.
    Above ground 15' x 30' oval - 52" deep
    Jacuzzi Sand Filter (not sure of size)
    2.5 hp off-brand pump 2-speed

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    Casey's Avatar
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    Re: adding bleach to pool

    Can you please tell us what caused the stain?
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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    Re: adding bleach to pool

    how many gallons is your pool? A plaster or fiberglass pool can withstand very high FC levels for a short period of time (and this is often what is done to control black algae).
    If your pool is 20k gallons then 15 gallons of ultra bleach will only raise the FC about 45 ppm. If you have a CYA level of about 100 ppm (not uncommon for a pool running on Trichlor) this is about the amount you need to kill black algae.
    If your pool is 10k gallons it will raise the FC to 90 which is what might be needed to kill white water mold or pink slime at these CYA levels

    Without knowing your CYA level it's really impossible to say whether this amount of bleach is excessive of not.

    Also, if the stains are metal the bleach will have no effect or could make them worsen. If the stains are organic then, once you take the CYA level into account, nuking the pool with chlorine will remove the stains and is standard operating procedure.

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    reebok's Avatar
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    Re: adding bleach to pool

    pictures would also help, as well as a full set of test results.
    16x32 21,000 gallon in-ground exposed aggregate, 1.5hp pump, 120 sqft catridge filter, birdcage, solar panels, aquavac tigershark qc robot.

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