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Thread: Am I using too much chlorine?

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    cliffstone's Avatar
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    Am I using too much chlorine?

    I was talking with a pool owner and I mentioned that my pool "uses" about
    4 ppm of chlorine every day and has been consistently at this amount as
    long as my CYA level remains ~40-50. He seemed shocked that I use about
    one jug (182 oz 6% until the new 121 8.25%)per day, which for what I pay
    for bleach ($9.98 for three jugs at Sam's) comes to around $3/day. Does
    this amount either in chlorine usage or price seem out of the ordinary?

    Thanks
    18x36 IG, 22k Gal, Vinyl, 1HP Hayward SuperPump, 250lb Hayward Sand Filter

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    Re: Am I using too much chlorine?

    That's quite a bit. what does your water look like? Have you done a CC's test? Are you pretty confident in the CYA test?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    cliffstone's Avatar
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    Re: Am I using too much chlorine?

    Water looks great. Always has since I went BBB. I never have any CC or have to shock.
    Once I get the pH, Alk and CYA adjusted in spring all I do is add bleach and a little acid
    from time to time. I add bleach to raise FC level to 8 at night and the next night it's always
    at 4.
    18x36 IG, 22k Gal, Vinyl, 1HP Hayward SuperPump, 250lb Hayward Sand Filter

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    Re: Am I using too much chlorine?

    Are you pretty confident in the CYA test?
    How are you testing?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    cliffstone's Avatar
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    Re: Am I using too much chlorine?

    Using the TF100 kit. At the beginning of the year the CYA was 0 so added
    3 lbs of CYA - tested again and it was 20 - added another 3 lbs and the
    CYA came up to 40 which is where I try to keep it.
    18x36 IG, 22k Gal, Vinyl, 1HP Hayward SuperPump, 250lb Hayward Sand Filter

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    bmann71's Avatar
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    Re: Am I using too much chlorine?

    Cliffstone, from your post you seem like you have been using the BBB for awhile (more than just this year) if so why was you CYA at zero? Did you have to drain and refill your pool?
    Ponduke
    20,000 gal/ Fiberglass IG/ Sta-rite s7m120 cartridge filter/Sta-rite SR400NA 400,000 btu heater/Polaris 360 Cleaner/K-2006 Test Kit
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    Re: Am I using too much chlorine?

    Hmmm, about the only thing left is to up the CYA to around 50-60.....that'll reduce your consumption but I am not positive it will reduce it enough to justify the expense of the CYA...probably, just don't know.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    cliffstone's Avatar
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    Re: Am I using too much chlorine?

    We had a lot of rain last year and I had let the CYA drop last fall. Then we
    had a wet winter and I had to pump out a lot of water over the winter months.
    18x36 IG, 22k Gal, Vinyl, 1HP Hayward SuperPump, 250lb Hayward Sand Filter

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    Re: Am I using too much chlorine?

    You can always run a pool-school/overnight_fc_test to see if there are some organics consuming the chlorine. Bring the FC up around 10 ppm to run the test. If this test passes, then I'd raise the CYA 10 more points.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

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    Re: Am I using too much chlorine?

    I have been having a similar issue. I have been using BBB for several years with great results. On average, I would use a full jug of 6% bleach every other day depending on heat, etc. This year, had a new liner installed, got my CYA to 40 and I am still dumping 121oz of the new 8% bleach every day. Today, my FC was 1.2 in the morning (6:45am), I added 2 jugs of 8% bleach which should have raised it to over 7.4. By 2pm, the level was 4.4 (76 degrees and pool is in bright sunshine). CYA still at 40. Other numbers are in range. Used old test strips which were pretty close to my test kit numbers, except CYA which showed low. Wonder if my CYA reagent has exceeded its shelf life. I was going to bump CYA to 50 and see what happens. Any other ideas? ALso, anyone else notice that the liquid stabilizer bottle seems to say it will raise CYA by a greater ppm than the pool calc says?

    Thanks for any input!

    Gerry
    Pool: 25,000 gal.(appx.)/IG/Vinyl/DE
    1.5 HP superpump / Filter Flow Rate - 72gpm (as per spec.)
    Hayward 300,000 BTU natural gas heater / Polaris 380
    Long Island, NY

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