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Thread: Chlorine burning off Slowwwwwly

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    Chlorine burning off Slowwwwwly

    My CYA is 75. Yes, I know it's high and this causes chlorine to burn off more slowly, correct?

    I just want to make sure about this b/c between yesterday and today, my FC went down by only .5ppm (form 15.5 to 15). This just seems a little slow. The previous day, it had gone from 17.5 to 15.5 - but we also had rain during that 24 hour period.

    I realize that the chlorine will burn off eventually, but I'm just impatient b/c we will be using the pool throughout the weekend.
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    Mod Squad Bama Rambler's Avatar
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    Re: Chlorine burning off Slowwwwwly

    Is the dial on your feeder on zero. Even if it is it could leak a little through it. With a CYA of 75 you're safe to swim with it at 15.
    Dave J. TFP Moderator
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    Re: Chlorine burning off Slowwwwwly

    Quote Originally Posted by Bama Rambler
    Is the dial on your feeder on zero. Even if it is it could leak a little through it. With a CYA of 75 you're safe to swim with it at 15.
    Yeah, I'm thinking there's probably a trickle coming through with the feeder, but it is set at zero.
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    frustratedpoolmom's Avatar
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    Re: Chlorine burning off Slowwwwwly

    Swim! That level is fine and harmless with a CYA of 75

    Helpful links: Pool School; CYA/Chlorine Chart
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    Re: Chlorine burning off Slowwwwwly

    Quote Originally Posted by frustratedpoolmom
    Swim! That level is fine and harmless with a CYA of 75

    No doubt, I just got out of the pool and it was . Could have been a little less chloreeny but nothing worth staying out of the pool for.
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    Re: Chlorine burning off Slowwwwwly

    Could have been a little less chloreeny
    I'm curious about that. Tell me what it was that made it "chloreeny"
    Dave S.
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    Re: Chlorine burning off Slowwwwwly

    Quote Originally Posted by frustratedpoolmom
    Swim! That level is fine and harmless with a CYA of 75

    No kidding...we were swimming last week at 22-24 with CYA 55...no ill effects whatsoever...we swam almost the entire time I was shocking...causes a little backward progress but...we only have 4 months so...

    As long as it is clear and not excessive CCs, we swim. So...if you were feeling 'chloreeny'...there may be something going on.

    Edit: I hadn't read the ^ post until after I mentioned CCs....
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    Re: Chlorine burning off Slowwwwwly

    Quote Originally Posted by duraleigh
    Could have been a little less chloreeny
    I'm curious about that. Tell me what it was that made it "chloreeny"
    There's a certain smell & taste of the water when the chlorine is a little high. And also, the skin dryness is a little more when you get out of the water.
    TFP SUPPORTER through TFTestKits.com - My Pool: South Florida, 11K gallons, In ground, concrete / Diamond Brite, Free Form with attached spa (no heater- go figure) Built around 1998, original surface, Jacuzzi Magnum Force 1.5HP pump, Jacuzzi Cartridge Filter, Rainbow 320 Tablet Feeder, Hayward Navigator Pro, Taylor K-2006 w/ TFTestKits replacemeng Reagents.

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    Re: Chlorine burning off Slowwwwwly

    Quote Originally Posted by niceguymr
    Quote Originally Posted by duraleigh
    Could have been a little less chloreeny
    I'm curious about that. Tell me what it was that made it "chloreeny"
    There's a certain smell & taste of the water when the chlorine is a little high. And also, the skin dryness is a little more when you get out of the water.
    Curious. I've been in my pool with FC higher than that (CYA also higher) and can't smell anything. Nor does my skin feel dry or itchy afterwards. Hair, what's left of it, doesn't feel straw-like when it dries.

    Now for the TFP Mantra: Can you post a full set of test results?
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    frustratedpoolmom's Avatar
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    Re: Chlorine burning off Slowwwwwly

    Yeah, that smell is prob CCs... how high were they when you did the aforementioned testing?
    Helpful links: Pool School; CYA/Chlorine Chart
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    Re: Chlorine burning off Slowwwwwly

    Like Richard, I have had my pool in very high FC conditions with no detectable differences from normal. Postiong a full set of test results will be helpful.
    Dave S.
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    frustratedpoolmom's Avatar
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    Re: Chlorine burning off Slowwwwwly

    Me too...never had drier skin or smell/taste.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
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    Re: Chlorine burning off Slowwwwwly

    Quote Originally Posted by Richard320
    Now for the TFP Mantra: Can you post a full set of test results?
    FC - 15
    CC - .5
    PH - 7.5
    TA - 90
    CH - 260
    CYA - 75

    That was taken yesterday immediately after I went for a swim. (The CYA was tested a few days ago)
    TFP SUPPORTER through TFTestKits.com - My Pool: South Florida, 11K gallons, In ground, concrete / Diamond Brite, Free Form with attached spa (no heater- go figure) Built around 1998, original surface, Jacuzzi Magnum Force 1.5HP pump, Jacuzzi Cartridge Filter, Rainbow 320 Tablet Feeder, Hayward Navigator Pro, Taylor K-2006 w/ TFTestKits replacemeng Reagents.

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    frustratedpoolmom's Avatar
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    Re: Chlorine burning off Slowwwwwly

    Hmmm. They look good!
    I don't see anything to indicate why you would have a chlorine smell. Maybe you are more sensitive to it then me?
    Helpful links: Pool School; CYA/Chlorine Chart
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    Re: Chlorine burning off Slowwwwwly

    Quote Originally Posted by frustratedpoolmom
    Hmmm. They look good!
    I don't see anything to indicate why you would have a chlorine smell. Maybe you are more sensitive to it then me?
    That's kinda what I was thinking. I'm going to retest everything again today just to make sure my results are consistent.
    TFP SUPPORTER through TFTestKits.com - My Pool: South Florida, 11K gallons, In ground, concrete / Diamond Brite, Free Form with attached spa (no heater- go figure) Built around 1998, original surface, Jacuzzi Magnum Force 1.5HP pump, Jacuzzi Cartridge Filter, Rainbow 320 Tablet Feeder, Hayward Navigator Pro, Taylor K-2006 w/ TFTestKits replacemeng Reagents.

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    Melt In The Sun's Avatar
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    Re: Chlorine burning off Slowwwwwly

    For what it's worth, I can smell chlorine on my skin after swimming at high FC (higher than normal, but not shock level). Not a CC smell; it smells just like bleach. I guess niceguymr and I have much sharper senses than the rest of you chumps!
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    Re: Chlorine burning off Slowwwwwly

    If you sweat a reasonable amount, then at higher chlorine levels you can smell CC on your skin and that's monochloramine. If you don't sweat much, then you can sometimes smell the FC which smells like bleach.

    The odor threshold for smelling chlorine in the air above the water is roughly an FC that is around 25% of the CYA level. For monochloramine, it's a CC level of around 0.6 ppm. On skin, evaporation will remove the water increasing the concentration of what is left so some people can smell chlorine on their skin even if the chlorine level in the pool is very low.
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