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Thread: Chlorine Consumption

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    Join Date
    May 2016
    Location
    The city, florida
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    13

    Chlorine Consumption

    I'm averaging about 3-4ppm of chlorine consumption, daily. I live in sunny Florida with daytime temps reaching 95+ with no shade. I'm a new pool owner and have used the BBB method from the beginning. My pool (15000 gal) is plaster without SWG. My water is crystal clear and I'm losing ~1ppm with oclt. My recent readings are as follows:

    FC: 3
    CC: 0
    Ph: 7.8
    TA: 90
    Ch: 230
    CYA: 30

    Is 3-4 ppm FC typical, given the above? I've been dumping 60-75 ozs per day of 10.5%.




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    Mod Squad Texas Splash's Avatar
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    Jun 2014
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    South-Central Texas, Marion/San Antonio
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    Re: Chlorine Consumption

    Hello and welcome to TFP! In the summer, we like to see FC loss that does not exceed 4 ppm in a 24 hr period. You're right on that border, and given the fact your CYA is a bit low (in my opinion for FL), you could probably increase CYA to 40-50 very easily and save more FC. As long as your OCLT does not exceed 1 ppm, you should have no concerns with algae, so increasing the CYA would be the next logical step. Hope that helps.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Join Date
    May 2016
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    The city, florida
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    Re: Chlorine Consumption

    Thanks for the quick reply. Guess I can throw in a few tabs in my chlorinator to gradually raise CYA. On average, how many PPM of CYA is added by a typical 3" tablet?



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    Mod Squad Texas Splash's Avatar
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    Re: Chlorine Consumption

    It can vary based on flow rate and type of tab. The Poolmath calculator has a tool at the bottom (Effects of Adding Chemicals) that helps with that. But in general, you can estimate each tab will increase CYA by around 7-9 ppm.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  5. Back To Top    #5
    bobodaclown's Avatar
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    Apr 2011
    Location
    Murrieta, CA
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    2,360

    Re: Chlorine Consumption

    Welcome. There are different factors, bathing load and sunlight are just two of them that will affect chlorine usage. I think you you may be on the edge of an algae bloom. 70 oz of bleach will raise your FC level by 4. You're at 3, it should never go below 2. I would recommend to SLAM, as insurance, nip it early if an issue, you shouldn't have a 1 ppm loss during the night. (No sunlight to break down the chlorine, it must be fighting something.) This is one of those times it's better to run a little higher than lower.
    Enjoy the water.
    Murrieta, CA. 15K (Est) pool/spa. Hayward Tristar SP3220EE 2.70HP pump, Hayward Swimclear Cartridge filter C4025 425sqft (PA106), Pentair Mastertemp 400 heater. TF-100/Speedstir

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