Best Chlorine Tablets

What criteria that makes the best swimming pool chlorine tablets?

This is a question that all swimming pool owners might ask if this is their first time owning any. When it comes to swimming pool maintenance, there are three (3) things that one needs to worry about:

  • Bacteria
  • Viruses
  • Protozoa

If you have ever accidentally tasted swimming pool water, you know that it tastes funny. That is thanks to chlorine. However, chlorine plays more roles than just giving such a taste on the water.

Chlorine —especially in tablets— is your saviour while swimming in the pool. It helps to kill off dangerous microorganisms. These microorganisms can cause a lot of unpleasant things, from an ear infection, athlete’s foot, gastroenteritis, and also Legionnaires disease.

There are plenty of chlorine tablets to buy, but which ones are the best? To get rid of those bacteria off your swimming pool water, careful consideration is needed.

Some things to consider regarding swimming pool chlorine tablets

Before we go on, here are some things to consider before choosing your swimming pool chlorine tablets:

  • The types of chlorine tablets
  • The dosage and size
  • The package of the tablets
  • The chlorine percentage
  • The stabilized chlorine tablets
  • The active ingredients

The 5 Best Swimming Pool Chlorine Tablets

If you still have not decided which one to use for your swimming pool, these are the top five (5) to consider:

1. In the Swim 3-Inch Pool Chlorine Tablets 50 lbs

In The Swim 3 Inch Pool Chlorine Tablets

This product consists of almost 100% Trichlor-s-triazinetrione and 90% stabilized the chlorine. The perfect dosage is one to two tablets per 10 thousand gallons of water for once a week. Do not forget to consider your swimming pool temperature and sunlight for the dosage to work wonders, though.

Each bucket has 114 tablets. Here are the pros and cons:


  • The dissolving process of the tablets is slow and even.
  • These tablets are affordable and work wonders.
  • These tablets are also well-protected.


  • Unfortunately, these tablets are also fragile.

2. Clorox Pool&Spa XtraBlue

Clorox Pool&Spa XtraBlue 3″ Long Lasting Chlorinating Tablets

For starters, these Clorox tablets are easy to remember. You can use this product for between 700 to 5,000 gallons of water. These tablets target bacteria right away and prevent algae from growing to infest the pool. With this product, scale and dirt also get eliminated quickly.

Here are the pros and cons:


  • They are efficient to remove bacteria and other microorganisms.
  • You do not have to worry about algae.
  • These tablets work wonders for a huge amount of water.
  • The smaller tablets work wonders for smaller pools.


  • To some people, this product may seem a little bit expensive. However, if you are willing to invest in this, then it is definitely worth it.

3. Kem Tek 28156 SwCnmP Chlorinating Tablets

If your swimming pool is placed outdoor, then these chlorine tablets are perfect for you. Consisting of 85.5% active chlorine and 95% Trichlor-s-triazinetrione. Each tablet is one-inch. However, you should not judge their capabilities by their size.

Here are the pros and cons of using this product:


  • Kem-Tek is the most workable for smaller swimming pools.
  • These tablets do not decay easily.
  • They have value.


  • Unfortunately, hot tubs are ‘no-go’ stuff for these chlorine tablets.

4. Clorox Pool&Spa Active99

Clorox Pool&Spa Active99 comes in various sizes. The quota is 1 to 4 parts per million of chlorine to keep the swimming pool water clean and clear. One tablet at a time will do, especially the skimmer to maintain the quota or percentage.

In short, here are the pros and cons:


  • This product is packaged in a waterproof canister.
  • When it comes to highly active ingredients, these tablets work effectively.
  • A tablet works wonders for 10,000 gallons of water, which means you get to save money.
  • There are a variety of sizes regarding these tablets.


  • Unfortunately, this product is also a bit expensive. This is only for those willing to go the extra mile to keep their swimming pools clean and clear.

5. Swim Best U009050050 Swimming Pool Chlorine

These chlorine tablets are EPE-certified. That means you can be certain that this product is safe to use. There are other things to ensure you to choose this.

For feeder baskets, skimmers, and floaters, these tablets are great. In fact, they get to cover down to all the corners of your swimming pool.

Without further ado, here are the pros and cons:


  • They work wonders as water-disinfectants.
  • They are also very effective.
  • These tablets spread across your swimming pool, slowly and evenly.


  • Unfortunately, these chlorine tablets are also quite fragile.


There are plenty of swimming pool chlorine tablets you may consider the best. Depending on the size of your pool, which one will it be?

You get to choose one of the best swimming pool chlorine tablets right here.

If you are a pool owner, it is plausible that you have already wondered what are the best chlorine tablets for the swimming pool. These chlorine tablets are added to the swimming pool to kill bacteria, viruses, and protozoa.

Provided you don’t know it yet, chlorine is the main reason why your pool water tastes funny. However, chlorine goes way beyond than just making your pool water taste funny.

Why your Pool Needs Chlorine tablets?

Have you ever seen a Hollywood movie with a perfect, sparkling pool water? The reason behind that crystal clear pool water is the chlorine tablets. Provided you have injected an optimum amount of chlorine into the pool, it will kill dangerous microorganisms which cause ear infection, athlete’s foot, gastroenteritis, and Legionnaires disease.

These bacteria seem to form in stagnant water. Consequently, it becomes customary for you to remove them through chlorination. Therefore, if while using your pool, it is crucial that you know the usefulness of chlorine tablets. After adding chlorine into your pool, you must know about how to keep its chlorine level up.


Different Types of Chlorine

There are two types of chlorine which are available in the market: stabilized and unstabilized chlorine. While the stabilized chlorine is used outdoor swimming pools, the unstabilized version is best for indoor ones.

Reason? As suggested by its very name, the stabilized chlorine lasts longer in the swimming pool. Hence, under the watchful eyes of the sun, it will protect your water, while chlorinating it at the same time. Consequently, it can last longer even in broad daylight.

However, as for unstabilized chlorine, its effectiveness diminishes under sunlight. Therefore, it is often recommended to use it for indoor swimming pools. However, if you carry out chlorination at night, you can use the unstabilized chlorine for outdoor pools as well.


What is the best time for chlorination?

There are some people who argue that you can add chlorine at any time of the day. As you might expect, there are others who claim that chlorination should be done at night. Reason? It’s simple: when added at night, you’ll give chlorine ample time to function and kill the bacteria.

While stabilized chlorine shields from sun rays, it cannot block them. Therefore, if you want to spend your money only once on chlorine tablets, I would recommend you to add them at night.

How to calculate Chlorine Demand of your Pool?

how to calculate chlorine demand of your pool


Some people complain to me that their pool water has turned cloudy after chlorination. Their concern is genuine, as, after spending money, they still haven’t got the desired result. The basic reason why their pool water misbehaves is the chlorine demand. As the name suggests, “chlorine demand” is the amount of chlorine which your pool needs.


Add less, and the bacteria won’t be killed. Add more, and the pool water will turn cloudy. Therefore, if you want to save your money, calculate the chlorine demand of your pool. Manual methods are available, too, but I would recommend you to go digital.

After answering your queries regarding chlorination, let’s take a look at what are the best chlorine tablets for the swimming pool.




If you have children who open their eyes underwater, this chlorine tablet is a must-have for your pool.

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With a 90% stabilized chlorine, the makers of these tablets have kept the wellbeing of their customers supreme in the making of these tablets.

Our Rating




In addition to protecting your water from UV rays, the Robelle Chlorine tablets come with a built-in clarifier and algae preventer.

Our Rating


​Top 5 Chlorine Tablets for Swimming Pool Reviews

If you have children who open their eyes underwater, this chlorine tablet is a must-have for your pool. Comprising an algae fighter, the 3-inch chlorine tablets will prevent the formation of algae. Moreover, with a built-in water clarifier, these tablets will make your water crystal clear.


With a water softener and scale preventer, these chlorine tablets are great for people who have sensitive skin. Lastly, being resistant to sunlight, these tablets have the ability to chlorinate your pool for one-week.




Provided that you have an outdoor pool, the Clorox pool will protect it from the harmful sun rays. It will also keep it free from algae and many forms of bacteria. One thing which forced me to perch these tablets at the 4th spot was the price factor.

Available in a multitude of bucket sizes, these chlorine tablets are cost-efficient. These tablets come in different weight buckets i.e. 5 and 12 pounds. Therefore, depending upon your pool, carefully make your selection.


#3: Pool Mate Jumbo


Stabilized with chlorine, the Pool mate jumbo tablets are designed for long-lasting action. Pour one tablet into the pool and live carefree for a long time. Since each tablet comes individually wrapped in a plastic packet, there is no danger of reduced efficiency.

Moreover, since each tablet is wrapped in a separate packet, their efficiency remains the same for a long time. Lastly, they come in a variety of sizes – from 4-pounds to 50-pounds.

#2: Robelle 1410M

In addition to protecting your water from UV rays, the Robelle Chlorine tablets come with a built-in clarifier and algae preventer. Also, since these tablets are stabilized, they would take some time to dissolve.


In other words, they wouldn’t burn off fast, making your pool pristine and healthy. Lastly, the makers of these tablets have designed them in such a way that they are UV-resistant. Therefore, if you use these tablets, an extended chlorine life will be at their disposal.

#1: In the Swim 3Inch Tablets

While there were many factors which perched these tablets at the No. 1 Spot, the most important was the price factor. As you can see yourself, these tablets are highly cost-effective.

Moreover, with a 90% stabilized chlorine, the makers of these tablets have kept the wellbeing of their customers supreme in the making of these tablets. Typically, in a 50lb bucket, you’ll get 114 tablets.


For a swimming pool owner, getting the best chlorine tablets is crucial for the wellbeing of their swimming pool. Therefore, honoring your demand, we’ve listed the top 5 chlorine tablets available in the market. In case you think that we missed a few, please leave your suggestions in the comments box.