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Thread: What's the deal with chlorine tabs?

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    What's the deal with chlorine tabs?

    Hello all - I have a general question about using chlorine tabs in my in-line chlorinator. Regardless of what my CYA level currently is, is it true that chlorine tablets in general contain Trichlor and that continued use will gradually increase CYA levels?

    Thanks!
    AG 10,400 gallons vinyl liner, Hayward 1.0 HP, Sand filter, Houston, TX

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    n240sxguy's Avatar
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    Re: What's the deal with chlorine tabs?

    Yes, that is correct. I'd say rapidly vs gradually though. 4-6 hot summer weeks could have you way over the recommended cya level.


    30K gallon IG vinyl. 1.5HP 2-speed Waterway Mustang pump. 600 lb sand filter. Polaris 280. Circupool SI-60+. TF-100

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    Richard320's Avatar
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    Re: What's the deal with chlorine tabs?

    Quote Originally Posted by n240sxguy View Post
    Yes, that is correct. I'd say rapidly vs gradually though. 4-6 hot summer weeks could have you way over the recommended cya level.


    To expand on that, according to poolmath, in a pool your size, one puck will raise FC by 5.3 and CYA by 3,2. If you figure most pools lose 2-3 ppm FC per day, then you can reason that you'll use half a puck per day, which will add 1.6 CYA per day. In round figures, 11 per week. If you start with fresh water now, by 4th of July you'll be at 100 CYA.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: What's the deal with chlorine tabs?

    Thanks very much. So in other words, am I to understand that it is probably safest not to use them?
    AG 10,400 gallons vinyl liner, Hayward 1.0 HP, Sand filter, Houston, TX

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    Richard320's Avatar
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    Re: What's the deal with chlorine tabs?

    Quote Originally Posted by cpmoshjr View Post
    Thanks very much. So in other words, am I to understand that it is probably safest not to use them?
    They serve a purpose, like when you leave town for a few days, or you've lost some CYA due to backwashing or splashout or rain overflow. Daily? No. You are correct that it's best not to rely on them. Pool School - How to Chlorinate Your Pool
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    duraleigh's Avatar
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    Re: What's the deal with chlorine tabs?

    am I to understand that it is probably safest not to use them
    The better answer is TFP teaches not to use them if possible and understand how to use and manage them if you need to.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: What's the deal with chlorine tabs?

    Makes perfect sense - thanks all for the assistance!
    AG 10,400 gallons vinyl liner, Hayward 1.0 HP, Sand filter, Houston, TX

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