Best Chlorine Tablets for Swimming Pool in 2020 Reviews

Best Chlorine Tablets for Swimming Pool

Best Chlorine Tablets for Swimming Pool

To keep it sparkly and safe for the swimmers, each pool owner should frequently chlorinate the pool water.

It’s truly gas that provides that funny style to the pool water. However, it goes approach beyond giving your pool the peculiar taste. From keeping your pool water clean to keeping your family healthy, chlorine will all the significant lifting.

Chlorine tablets are arguably one in every of the foremost common approaches to killing the viruses, bacteria, and protozoa within the stagnant water. In different words, the chlorine tablets stop the formation of algae, keep the walls and floor away from any stains, and take away bad odor.

However, not all the gas tablets are created equal.

The overabundance of merchandise obtainable within the market builds selecting the most effective chlorine tablets hard, particularly if you don’t have any previous expertise of maintaining your pool.

To make matters worse, most of the tablets look alike.

Which complete must you trust? that chemical concentration is right? And a lot of importantly, what are the best chlorine tablets for swimming pools?

To make your venture easy, we’ve got return up with the list of high chlorine tablets when scrutiny nearly forty completely different brands and models.

Best Chlorine Tablets for Swimming Pool Reviews

Here are the 10 best chlorine tablet merchandise supported our comprehensive analysis and our reader’s feedback. this implies you utilize these products confidently of knowing that a lot of different pools house owners such as you are already {benefiting from|taking advantage of|cashing in on|profiting from|making the foremost of} these.

1. Clorox Pool&Spa Active99 3 Chlorinating Tablets 5 lb

Clorox Pool&Spa Active99 3 Chlorinating Tablets 5 lb
Available in a variety of sizes, bleaching agent Active 99 is among the most economical tablets you’ll realize for on top of ground pool.

You got to maintain 1 to four components per million of gas to stay your water clean and clear. Clorox Active 99 helps you are doing simply that, and you’ll reach it by mistreatment one pill at a time. However, you may have to be compelled to keep adding a lot of tablets to skimmer to keep up that percentage.

These tablets are appropriate for feeder or floater application. they’re all wrapped in plastic, that makes handling loads easier. These tablets take time to dissolve within the water, which suggests they keep active for long enough to supply intercalary protection against bacterium and algae.

The product is safe to use however is also thought-about a touch dearly-won by some.


These pool gas tablets work expeditiously to offer professional results. They take time to dissolve however keep your pool lean. the value could be a bit on the upper facet though.

  • Comes during a waterproof canister
  • Works expeditiously with extremely active ingredients
  • One pill works well for one0,000 gallons of water
  • Available in a type of sizes
  • A bit expensive

2. Kem-Tek 2815-6 Chlorinating Tablets 1-Inch Pool and Spa Chemicals

Kem-Tek 2815-6 Chlorinating Tablets 1-Inch Pool and Spa Chemicals
What are the most effective chlorine tablets for swimming pools, you ask? Look no more than Kem Tek Chlorinating tablets. These tablets are appropriate for many pools, as well as small above ground pools and crop up pools.

You will get the strip kind and use them whereas knowing what proportion chlorine is enough. These slow-dissolving tablets are appropriate for lasting sanitation and maintain a gradual gas residual.

Do not worry concerning chlorine loss to the actinic radiation rays since the tablets are stabilized. there’s no got to use quite one at a time, particularly for smaller pools. employing a water check kit could be a sensible plan tho’ as a result of it tells you once to feature more.

Keep in mind that it’s vital to vary the filters once each 2 months, especially if you utilize these tablets often. Excessive use might leave the water murky and need you to empty it often. Nevertheless, exhausting is far better than mistreatment chemicals to urge similar results.


Available in little 1-inch size, these tablets are simple to handle and supply lasting sanitation. you’ll have to be compelled to modification the filter typically to continue obtaining sensible results.

  • Suitable for each pool sanitization
  • Stabilized to forestall gas loss
  • Slow-dissolving tablets
  • Reasonable size for little on top of ground pools
  • May make a touch murky
  • May would like a lot of for larger pools

3. Clorox Pool&Spa Small Pool 1 Chlorinating Tablets 1.5 lb

Clorox Pool&Spa Small Pool 1 Chlorinating Tablets 1.5 lb

Finding the correct sort of gas tablets for your small pool isn’t any longer a problem with these bleaching agent tablets. it’s a formidable product that works quite like industrial chlorine.

The product works nice for pools of anyplace between 700 gallons and 5,000 gallons. The tablets target bacterium and stop alga from growing into the pool. They also facilitate eliminate the dimensions and dirty at an equivalent time.

You might have to be compelled to get atiny low floater to create them work perfectly. All you’ve got to try to to is place them within the floater and leave in the pool while not removing the filter.

The tablets are appropriate for warm tubs. the merchandise goes to last for a jiffy as a result of you are doing not would like too several tablets per session.


Using the tablets could be a extremely convenient thanks to keep your pool clean while not raising issues concerning your safety. the value might are higher though.

  • Help you get eliminate bacterium quite efficiently
  • No need to worry concerning alga growth
  • Quite appropriate for pools of up to 5,000 gallons
  • Smaller tablets suitable for smaller pools
  • Maybe a touch dearly-won for some

4. In The Swim 3 Inch Pool Chlorine Tablets – 10 Pounds

In The Swim 3 Inch Pool Chlorine Tablets - 10 Pounds

In the Swim Concentrated tabs are among the slowest-dissolving chlorine tablets available for your pool.  You can use them in hot tubs as well, but they are more suitable for smaller pools. They are available in a 25lb bucket with 55 tablets per bucket.

They are quite powerful with 90% stabilized chlorine. Each pill contains 99% Trichloro-S-triazinetrione for maximum performance. You can use the tablets in a floating dispenser or automated chlorinator, which makes them quite easy to use. They are also suitable for skimmers and feeders.

They take their time to dissolve when used in dispensers though. The tablets are also thicker as compared to other chlorine tablets. That is why they are the slowest-dissolving tablets available for your pool. You can get good results simply by using 1-2 tabs for every 10,000 gallons of water every week. While the product is effective, the customer service is a mess.


These are industry-leading {chlorine|Cl|atomic number one7|chemical element|element|gas|halogen} pills encompass 90% obtainable chlorine to produce lasting sanitizing power. 1 to two tablets are enough for 10,000 gallons of water.

  • 90% obtainable chlorine
  • Suitable for 10,000 gallons of water
  • Slow dissolving
  • Size fits all floaters and feeders
  • The tablets could be tamed packing

5. Rx Clear 1-Inch Stabilized Chlorine Tablets

Rx Clear 1-Inch Stabilized Chlorine Tablets

Rx Clear 1″ stabilized chlorine tablets build your pool crystal clean while not being harsh on your skin. The tablets contain 90% chlorine and 99% Trichlor. they’re slow dissolving and do a reliable job in reconciliation the pool chemistry.


Rx Clear 1″ stabilized chlorine tablets are extremely effective in reducing the chemical mess from your pool. Up to seven pills are required per 2,500 gallons of water. they’re slow dissolving. you’ve got to feature them once a week.

  • 90% available chlorine and 99% Trichlor
  • Each tablet weighs 0.5 oz.
  • Slow dissolving
  • Great performance at an occasional cost
  • More amount is needed for even smaller pools

6. POOLBRAND 3 Chlorinating Tablets – 50 lb

POOLBRAND 3 Chlorinating Tablets - 50 lb

These 3-inch tablets promise to stay your pool sanitized. they’re EPA approved. every tablet consists of 90% obtainable chlorine. the most effective quality of those tablets is that they aren’t blended or diluted. This makes them extremely effective to keep your pool water clean.

However, several users have complained that the pills dissolve quickly and it’s laborious to stay the {chlorine|Cl|atomic number one7|chemical element|element|gas|halogen} level right.


Each tablet is actinic radiation stabilised that extends their effectiveness. they’re slow dissolving however they fully mix within the water to sanitize it.

  • Tablets are EPA approved
  • They are actinic radiation stabilised for Associate in Nursing extended life
  • They are neither diluted nor amalgamated
  • They dissolve terribly quickly

7. Cclear Pool Chlorine Floater for Chlorine Tablets 3 inch

Cclear Pool Chlorine Floater for Chlorine Tablets 3 inch

Cclear pool supply pool chlorine floater is created from high-quality materials that don’t let it sink or break. It will foot-dragging to 1 to 3-inches tablets. The adjustable twist-lock cap prevents tablets from rift or staining the pool’s bottom. it’s foam crammed and it allows you to build the foremost out of your gas tablets.


Cclear pool offer pool chlorine floater is meant to extend the lifetime of chlorine tablets and allow you to sanitize your pool water.

  • It comes with a 2-year warranty
  • It’s created from industrial material
  • Fits 1 to three inches tablets
  • It’s sturdy and simple to use
  • This plastic floater isn’t the strongest

8. HTH 42007 1 Tablets Swimming Pool Chlorine, 5 lbs

HTH 42007 1 Tablets Swimming Pool Chlorine, 5 lbs

HTH chlorinating tablets are designed to stay your pool water clean and kill bacteria and algae. one pill can treat up to 10, 000 gallons of water for up to a week. The tablets are sun protected to boost their sturdiness and effectiveness. you’ll toss them into the pool directly or place them during a skimmer, feeder or floater.


HTH chlorinating tablets facilitate maintain a gas residual of 1- 4ppm. One tablet per 10,000 gallons of water is needed to keep up clean pool water.

  • Kills bacterium, algae, and different harmful organisms
  • Sun protected to forestall chlorine loss
  • Easy to use
  • Less amount of tablets is required
  • The tablets have a pointy bleach odor

9. NAVA Pool Care 3 Chlorinating Tablets – 25 lb

NAVA Pool Care 3 Chlorinating Tablets - 25 lb

Nava 3-inch chlorine tablets keep your pool water clean all season long. a top quality that sets these tablets apart is that they don’t cloud pool water. Place them through floater, feeder or skimmer. These tablets are concentrated, slow dissolving and that they leave no mineral scale behind.


Nava gas tablets keep your pool water disinfected while not clouding up it. Since they’re not the most effective quality tablets, they become brittle which makes them dissolve within the water quicker.

  • Effective for killing germs and bacteria
  • Concerted and stabilized
  • Easy to open and use
  • EPA approved
  • These don’t seem to be the most effective quality tablets out there

10. Star Plus 50-Pound Bucket of Swimming Pool

Star Plus 50-Pound Bucket of Swimming Pool

Star and 3-inch chlorinating tablets are ideal in size. They simply fit automatic gas feeders and floating dispensers. As shortly as you toss them into the pool, they begin operating to kill viruses, bacterium and different contaminants from the pool water. They contain 99% Trichlor. you’ll use them in each pools and spas.


Star and 3-inch chlorinating tablets hardly break within the packaging like other tablets. They keep in the pool water longer and that they do their job of improvement the water effectively.

  • Solid performance
  • The tablets are stabilized
  • Their size is ideal
  • The tablets have a pungent smell

11. Swim Best U009050050 Swimming Pool Chlorine

Swim Best U009050050 Swimming Pool Chlorine

Swim Best Bucket 3-inch tablets are quite effective for warm tubs moreover as on top of ground pools. These are giant enough to figure well for larger swimming pools.

They dissolve quite slowly, so facilitate keep the water disinfected for long. The tablets are extraordinarily simple to use with skimmers, floaters, and feeders baskets. The slow-dissolving mechanism ensures that the ‘ingredients’ unfold equally across the pool.

They are economical also as a result of they’re extremely concentrated. Interestingly, they leave no mineral buildup in your pool or tub. These EPE certified tablets guarantee safety.

The solely issue you’ll face is that these tablets are a touch fragile, that makes handling difficult. If you’ll undo them carefully, you may not have to be compelled to worry concerning a lot of though. value is sort of affordable too.


These extremely targeted tablets work expeditiously to stay your pool disinfected for long. they’re reasonable however feel a touch fragile at times.

  • Quite spectacular in terms of spreading across the pool
  • Offer lasting sanitation
  • Slow-dissolving tablets for higher performance
  • Quite fragile
  • Difficult to unwrap

12. Leisure Time RENU2 Renew Non-Chlorine Shock Treatment

Leisure Time RENU2 Renew Non-Chlorine Shock Treatment

Renew Spa Shock could be a appropriate selection for anyone trying to find a chlorine-free shock. you’ll use this shock of K peroxymonosulfate in many ways to stay your athletic facility clear, clean, and sanitary.

It works as a result of its ballroom dance “Reserve/Renew System.” The the first step is Reserve that’s primarily metallic element bromide. you’ve got to use the Renew to activate the Reserve. The interaction of the 2 chemicals creates bromine to sanitize your pool.

You might want to choose for it if your eyes cannot tolerate gas. However, you’ll also use it with chlorine, if you want, moreover like ozone, bromine, and mineral purification systems.

If you utilize it while not chlorine, you are doing not would like any floater or tabs. you’ll also use it with chlorine to burn off ammonia and chloramines. it’s obtainable in a cost-effective bulk package and is buffered to discourage pH fluctuations.


Coming from a well-thought-of manufacturer, Renew Spa Shock works fairly well with or without chlorine. It destroys deodorants soaps, and microorganism. you’ll realize it a touch expensive though.

  • Effective in decontaminating water and eliminating odors
  • A reputable manufacturer behind the tablets
  • Compatible with chemical element, chlorine, etc
  • No issue relating to chloramines buildup
  • Price might are better.
  • May take time to clear terribly cloudy water

13. DryTec Calcium Hypochlorite Chlorinating Shock Treatment

DryTec Calcium Hypochlorite Chlorinating Shock Treatment

Whether you’re trying to find one thing for Intex pool otherwise you would like how to scrub your surface pool, do this hypochlorite shock.

Available in a pack of 24 bags, this fast-active chlorinating shock will kill bacterium within the pool. It works expeditiously against alga and eliminates organic contaminants from your pool.

It uses 68�lcium hypochlorite, that is why it works quickly to enhance the looks of your pool. you’ll wish to place your cash on that if you do not like slow-dissolving chlorine tablets. It raises chlorine levels quickly because it dissolves in no time.

It promotes clarity, but you may need to use at least one bag for every 10,000 gallons of water.


Dry Tec Calcium Hypochlorite Shock is highly effective against bacteria and algae. It works quickly to improve the clarity and overall appearance of your pool. You need to use a lot to get good results though.

  • Available during a pack of twenty four bags
  • Quick-dissolving sanitizer
  • Efficient with 68�lcium salt
  • Effective against organic contaminants
  • Large doses required for desired results
  • Relatively expensive

14. In the Swim Chlorine Pool Shock

In The Swim Chlorine Pool Shock

When you are not that interested in chlorine tablets, using chlorine shock may serve you well. This highly effective shock treatment from In the Swim offers fast-acting oxidation. It proves efficient because of 68% of calcium hypochlorite.

It is effective against algae buildup and de-contaminate at the same time. You can use the shock treatment for your pools sanitized with bromine. You can enjoy swimming soon after treating the water with the product.

You get 24 bags, so using it is highly convenient. Just keep in mind that you cannot save the bag and have to use the entire content once opened.

The recommended dosage is 1 pound for every 10,000 gallons. However, you may have to use more to increase chlorine percentage to the required levels.


In the Swim Chlorine works efficiently to remove bacteria and eliminate dead chlorine cells. It may take time to improve chlorine levels in the pool though.

  • Highly effective chlorinated shock treatment
  • Availability of 68% of calcium hypochlorite for better results
  • A quick chlorine boost for proper sanitation
  • Suitable for pools sanitized with bromine
  • Only larger doses improve chlorine levels
  • Cannot save the unused bag

Tips on Choosing the Best Chorine Tablets

Choosing the right chlorine tablets for your pool can be a simple and straightforward if you keep these four factors in mind.

Calculate Chlorine Demand

Just as the name suggests, this is the amount of chlorine your pool needs to stay clean. Adding too little chlorine will result in some of the bacteria and scum evading chlorination. Adding too much will not only cost you more but may also make your water cloudy and can even adversely impact your pool equipment.

This is why it’s crucial to understand exactly how much chlorine your pool requires. This depends on the size and shape of the pool, and the amount of water in it. There are many ways to calculate the chlorine demand. However, you should consider investing in a good quality digital meter for accurate reading.

Stabilized vs Unstabilized Chlorine Tablets

There are two main types of chlorine tablets available in the market. They are either stabilized or unstabilized tablets.

Stabilized chlorine can last longer, even in the sunshine. They actually perform better in the sun and thus are ideal for outdoor pools. Also, they’re equally effective for both in-ground and for above ground pool.

On the other hand, unstabilized chlorine tablets are ideal for hot tubs (or pools) that are located indoors or in shady areas. Since they are unstabilized, chlorine loses its impact faster if it gets direct sunlight.

Understanding the Chemistry

It’s time to brush up your chemistry skills from the days back in school.

The major ingredient of any brand or product of is always either trichloro-s-triazinetrione or trichlor. However, most manufacturers combine other chemicals to increase the life and longevity of the tablets, as well as to increase its potency to fight algae.

While these chemicals can make the tablets long last longer by slowing down the release of chlorine, some of these can reduce the overall effectiveness.

Understanding the ideal balance here can be a little tricky. But to make things easy to understand, if your pool stays clear and fresh most of the times, you should go with tablets with high trichlor concentration.

On the other hand, if you experience frequent algae formation and other issues, you might want to go with tablets that have a higher percentage of other algae fighting additives.

Price by Quantity

Chlorine tablets are not ridiculously expensive. But your overall pool maintenance usually comes with a hefty price tag. This is because it involves so many different components that they can add up at the end of the day.

So, wherever you can save a few bucks, it will eventually bring down the overall cost of maintenance.

We have made every effort to include only the most cost-effective chlorine tablets in our top 10 list, so you have complete peace of mind when shopping. But remember to compare the prices of two different products by quantity. This is because some manufacturers offer higher quantity than others which can make the comparison a little harder.

Here are our picks for The Best Chlorine Tablets for Swimming Pool:

  • Best overall: Clorox Active 99
  • Best cheap chlorine tablets: Kem Tek Chlorinating Tabs
  • Best 3 inch chlorine tablets: In The Swim 3″ Pool Chlorine Tablets
  • Best stabilized chlorine tablets: Rx Clear 1-Inch Chlorine Tablets

What are Chlorine Tablets

Just as the name suggests, these are tablets that contain chlorine and other chemicals. This mix of chemicals acts as a disinfectant for your pool and kills the germs and other impurities.

Any impurities in the water can not only make your pool look dirty, but also pose a threat to the health of your family and anybody who may get into the pool. The chlorine tablets gradually release chemicals into the water and eliminate these unwanted bacteria and viruses.

How Much Chlorine Should You Use?

This can be a trick question depending on the size of your pool, how much debris you get, and the type of your pool (i.e., indoor vs. outdoor, in-ground vs. above ground).

Normally, the right number of chlorine tablets depends on the number of gallons of water in your pool. As a rule of thumb, it is ideal to add one tablet for every 5000 gallons.

One thing you need to make sure is to round off the number of gallons to the next 5000. For example, if your pool contains 15,000 gallons of water, consider adding 3 tablets. Likewise, if your pool is 20000 gallons, you will need to add four tablets. If your pool is 16000 gallons, you need to add four tablets.

What is the Best Time for Chlorination?

Most experts agree that chlorination should be done in the evening or at night. The simple reason is that chlorine will have more time to work and kill the bacteria and viruses in the absence of sun.

Fair enough, the stabilized chlorine can offer some shield against the harsh sun rays, but it does not block them completely. This is why it’s ideal to add your chlorine tablets to the pool at night. However, in case you have an indoor pool, you can chlorinate any time of the day.

Chlorine safety and precautions

Since chlorine tablets contain an assortment of chemicals, due diligence is required for proper storage and usage.

Store the tablets in a cool, dry and ventilated place. Remember, exposure of chlorine to bleach or even liquid chlorine can result in the release of harmful gases, even explosion. Likewise, contact with moisture or dirt can minimize the potency of chlorine tablets.

As long as you can make sure that chlorine tablets are properly packed and stored, they don’t pose any harm. Here are a few things to keep in mind for further safety:

  • Store out of reach of children and pets
  • Chlorine can be poisonous, so don’t ingest chlorine tablets
  • If you see chlorine fumes coming out of tablets, take them outdoors and avoid inhaling the fumes
  • Use gloves to touch any type of chlorine
  • Don’t mix with any other chemicals
  • Don’t mix with other types of chlorine

Why You Should Not Add Chlorine Tablets to the Skimmer?

Some people might suggest putting the chlorine tablets in the skimmer for easy chlorination.

Simple solution right?

Well, maybe not!

Pool pump and filter are the two main organs of your pool’s circulation system. If you put the tablets in your skimmer, once you turn the pump and filter off, the tablets will gradually start dissolving into your skimmer.

This can form highly acidic water which can go into your filter when you turn the pump back on and damage the internal parts of the filter such as cartridges, O-rings, and gaskets.

What’s the best way to chlorinate your pool then?

Instead of using the skimmer, consider getting a chlorinator, which can run on a preset setting to gradually release chlorine into your pool.

A chlorinator usually works with your existing pump and filter and can be installed pretty easily. The best thing about using an automatic chlorinator is that it will ensure even distribution of chlorine across the entire body of water.

The only downside is that it can be a little expensive.

However, if you don’t want to invest too much money, you can get a floating chlorinator. It is just a plastic vessel that keeps floating in the pool and releases chlorine into the water.

Not as effective as a chlorinator, the floating chlorinators are extremely cheap and can be found at your local stores.

If you don’t want to spend any money at all, you can just drop the tablets into your pool water directly. Just make sure that you drop them next to the point of water return. This can avoid any damage to your pool’s circulation equipment.


The best chlorine tablets will keep your pool water crystal clear without shrinking your bank. The tablets on our top 10 list are not only highly effective but are also long-lasting. Furthermore, there are many other ways they make your life easy.

Firstly, you don’t have to chlorinate too often. Secondly, they work pretty fast to eliminate the bacteria, viruses, pathogens, scum, slime, and other germs. What’s more, most of the above-mentioned products are very safe and come in conveniently sized packages.

In short, these tablets will keep your pool clean and safe at an affordable price and with little effort.

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