Swimming Pool Chlorine Tablets

Swimming Pool Care & Chemistry


The importance of swimming pool chlorine tablets to keep your pool safe, crystal clear, and clean cannot be overstated. If you have an outside pool you're probably going to need pool tabs in the near future.

How To Use Them

Your first step is to calculate your pool's water volume. For a:

  • Rectangle pool- L x W x D x 7.5. The length is multiplied by the width and that number is multiplied by the average depth. After you have these calculations you then convert the volume into gallons by multiplying the final number by 7.5.

  • Circular or oval pool- C x D x 5.9. C is the circumference. Take the circumference number and multiply that by the average depth. The take that number and multiply by 5.9 which will give youthe water volume of the pool.

    • Next Step

    The two sizes 1" and 3" tabs. If you have a very small pool the 1" will probably work. The floater should usually hold 2 - 3 tabs and since some will dissolve faster than others you'll need to replace them more frequently.

    Your Chlorine Tablet Dispenser

    Your dispenser will be floating in your pool releasing the chlorine and acid your pool needs. Simply unscrew the top of the floater and place the chlorine tablets inside, screw the top back on and throw it back into the pool.

    Be sure the holes on the bottom of the dispenser are open all the way to allow for better circulation of the swimming pool water.

    You can also purchase the many varieties of swimming pool chemical feeders. You place the tabs in the cylinder and use the dial to adjust just how much and how often you want you pool to be chlorinated.

    This one is great for those pool owners who like to take longer vacations and don't want to worry about their chlorine tablets running out too soon.

    Please don't just throw them into the pool and allow them to sink to the bottom. Not only will you not get the full use of the tabs but you may end of ruining your vinyl liner.


    Testing The Pool Water

    You need to take into consideration the size and brand of your chlorine tablets. Basically all you need to do is replace them when they run out but it's also good to have the proper pool water testing kit. Swimming pool chlorine should be between 1.5 - 3.5ppm and your CYA between 20 - 40ppm.


    Cyanuric Chart

    Cyanuric Acid Minimum Chlorine ppm Goal Chlorine ppm
    20 1.5 2.5-3.0
    30 1.5 3.5-4.0
    40 2.5-3.0 4.5-5.0
    50 3.5-4.0 5.5-6.0
    60 4.5-5.0 6.5-7.0
    70 4.5-5.0 7.5-8.0
    80 5.5-6.0 8.5-9.0
    90 6.5-7.0 9.5-10

    By keeping an eye on your cyanuric acid level, your sanitizer will do it's job properly and you may not need any extra swimming pool chemicals.

    Benefits Of Swimming Pool Chlorine Tablets

  • Ease of use

  • Relative safety

  • Stable form of chlorine

  • Inexpensive

  • Will not increase calcium hardness as does Calcium Hypochlorite

  • In water with a high pH level these chlorine tablets can help bring the pH level down

  • Can be used in a chlorine tablet pool chlorinator system



    • Negatives Of Swimming Pool Chlorine Tablets

  • Must be added directly into the floater or swimming pool chemical feeder

  • Must be stored away from children, pets, and heat

  • CYA will continue to rise so you may need to re-fill part of the pool water

  • May cause staining if left on the bottom of the pool or a good blast of acid if placed in the skimmer

  • Not suitable for a pool shock

  • Some swimming pool owners may not like a device floating around their pool all the time


    • And there you have some pretty good information on your pool chlorine tablets.

    Use your tabs on a regular basis, test the water with a good test kit, and have the pool you deserve.

    Go To:

    Pool Chlorine From Pool Chlorine Tablets
    Chlorine Tablets
    Swimming Pool Chemistry From Pool Chlorine


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