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Thread: Is there a "normal" daily chlorine use?

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    stev32k's Avatar
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    Is there a "normal" daily chlorine use?

    I'm mostly just curious because my chlorine use has been amazingly constant for the past several days. I test every morning around 8 AM and my target is 5 ppm. The FC at 8:00 AM has been 3.5 for the past eight days in a row and adding 3 quarts of 6% bleach brings it to 5 ppm exactly. The other parameters are also very constant:

    FC 5.0
    CC 0
    pH 7.5
    TA 80
    HC 120
    CYA 40

    I can't tell you how pleased I am with the information I've received on this site. The water is as clear as clean glass and I have not had to shock it or kill algae since I started following the suggestions here.

    I still have yellow stains that I'll have to try to remove using the ascorbic acid method, but I've been putting it off hoping they would just go away.
    20' x 40' IG with vinyl liner volume approx. 35,000 gal.1.5 H.P. main pump, Polaris 280 cleaner W/ 3/4 H.P. booster pump
    Hayward sand filter, 3.14 sq ft, 62 gpm. Stenner 45 MPH10 chlorine feed pump. 1 micron final filter bags (home made and very effective)

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    JasonLion's Avatar
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    Re: Is there a "normal" daily chlorine use?

    The amount of chlorine used varies depending on the water temperature, bather load, and amount of sunlight. If all of those things stay more or less the same then the amount of chlorine used will remain more or less constant.
    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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    stev32k's Avatar
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    Re: Is there a "normal" daily chlorine use?

    I was mostly wondering if the 1.5 PPM chlorine consumption per day was average, high, low, normal, or maybe there is no way to tell? I was never able to test chlorine levels with any degree of confidence until I got the TF100 test kit. Now I'm trying establish some kind of base line data to be able to tell if/when problems are starting to develop.

    In addition to the factors you mention of bather load, temperature, and amount of sunlight - where I live one must factor in the number of earth worms, millipedes, crickets, moles, field mice, spiders, lizards, toads, turtles, snakes, armadillos, possums, and rabbits that drown in the pool each day.
    20' x 40' IG with vinyl liner volume approx. 35,000 gal.1.5 H.P. main pump, Polaris 280 cleaner W/ 3/4 H.P. booster pump
    Hayward sand filter, 3.14 sq ft, 62 gpm. Stenner 45 MPH10 chlorine feed pump. 1 micron final filter bags (home made and very effective)

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    duraleigh's Avatar
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    Re: Is there a "normal" daily chlorine use?

    I was mostly wondering if the 1.5 PPM chlorine consumption per day was average, high, low, normal, or maybe there is no way to tell?
    Anecdotally, a clean pool seems to average 2-3ppm loss daily........you seem to be doing better but it's a little early (your consumption should increase in the hot summer)

    If you start to lose say 4-6ppm or more daily, it should get your attention....something else is consuming you FC besides the sun.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    stev32k's Avatar
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    Re: Is there a "normal" daily chlorine use?

    OK, thanks that is what I was looking for - I didn't know if 1.5 ppm per day was excessive, or low, or average.
    20' x 40' IG with vinyl liner volume approx. 35,000 gal.1.5 H.P. main pump, Polaris 280 cleaner W/ 3/4 H.P. booster pump
    Hayward sand filter, 3.14 sq ft, 62 gpm. Stenner 45 MPH10 chlorine feed pump. 1 micron final filter bags (home made and very effective)

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    JasonLion's Avatar
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    Re: Is there a "normal" daily chlorine use?

    2 ppm per day is probably the average for most pools. 1.5 is good. Of course the amount of chlorine used will increase as the water gets warmer and when more 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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