7 Best Pool Chlorine Tablets

By Greg Jarvis | Last Updated: September 8, 2022

A clean and germ-free pool/spa is a taste of supreme importance to proud pool owners. Pool cleaners have the sole business of removing dirt and debris from the pool.

However, some contaminants and germs accumulate in a pool from usage over time. The best way to eliminate them is with the use of the best pool chlorinating agent.

Chlorine cleanses the pool by preventing algae growth. It keeps water safe by attacking and neutralizing harmful microorganisms.

Need to choose the best pool chlorinating product? This review is for you. It consists of the 7 best pool chlorine tablets. We carefully selected them from the market.

What is a Chlorine Tablet?

Chlorine tablet is a typical pool and hot tub add-on that destroys bacteria, microscopic insects, and algae spores. Despite its lethality to insects and microbes, the water is safe for people as long as the chlorine level stays between 1 and 3 ppm (parts per million) and with a pH balance of 7.2 up to 7.8. The tablet is premeasured and dissolved gradually without drastically boosting chlorine levels in any section of the pool. Most pool owners prefer using tablets because of their convenience and effectiveness. Also, the tablets will not cost you that much. You just need to find the best chlorine tablet available in the market.

How Does Chlorine Work?

Pathogens such as bacteria and viruses are killed by chlorine by disrupting the chemical connections in their molecules. Disinfectants for this purpose are made up of chlorine compounds that can exchange atoms with other molecules, such as enzymes found in bacteria and other organisms. To kill microorganisms, chlorine is added to the water. When added to a swimming pool, it produces a weak acid known as hypochlorous acid, which kills bacteria such as salmonella and E. coli and other germs that cause viruses like swimmer’s ear and diarrhea. The acid attacks the lipids in the cell walls and destroys the enzymes and the cell’s internal structure, making them oxidized and safe. The hypochlorous acid can oxidize the organisms within seconds.

Best Chlorine Tablets for Above Ground Pool Comparison

Images Product Details Price
  • Size: 3 inches
  • Type: Trichloro
  • Method of Application: Skimmer, floater, feeder
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  • Size: 3 inches
  • Type: Trichloro
  • Method of Application: Skimmer, floater, feeder
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  • Size: 3 inches
  • Type: Chlorinating tab
  • Method of Application: Skimmer, Floater, Feeder
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7 Best Chlorine Tablets for Swimming Pools in 2022

1. Swim Best U009050050 Swimming Pool Chlorine

Swim Best U009050050 Swimming Pool Chlorine, 50 lbs

Swim Best U009050050 is a high-quality product in various sizes, but most stores offer 50-pound buckets. The tablet will keep the water pool in perfect swimming condition all the time. The brand is recommended with floaters, skimmer baskets, and feeders to spread the tablet evenly. These chlorine tablets can chlorinate pool evenly and last longer, so you don’t have to redo it often.

Last Longer

On average, the Swim Best U009050050 tablets will last for a week up to a week and a half, with more pills needed for bigger pools. It applies to all chlorine additives, but it is worth remembering when choosing a floater or dispenser system to be used in your pool.

Tablets are Individually Wrapped

The tablets are wrapped individually to make sure they are protected. These tablets are enclosed in a waterproof bucket, locked safely, and very durable. You can rest assured all the pills are safe when stored away.

Dissolves Slowly

Each tablet contains 99% trichlor and 90% available stabilized chlorine and is designed to dissolve slowly and last long, so you don’t need to replace them often.

2. Clorox Active99 3” Chlorinating Tablets

Clorox Pool&Spa Active99 3” Chlorinating Tablets 35 lb.

Clorox is a well-known manufacturer of household cleaning goods. The manufacturer’s well-earned reputation extends to the equipment this company makes for keeping the swimming pool clean. Clorox Pool and Spa 3 inch tablets in a 25-pound package are excellent for above-ground and in-ground pools. The brand has several options that you can choose from. You can easily buy it both online and from the pool accessories store.

Individually Wrapped

The Clorox tablets are individually wrapped enclosed in the bucket, preserving their condition and keeping them safe to use upon adding to the pool. They are extremely good at removing algae and germs from pool water. They also prevent bacteria from growing in the long run by slowing their growth from the start.

Can Treat Up to 5000 Gallons

The bucket of Clorox chlorine tablets can treat up to 5000 gallons of water. But weekly pool chemistry testing is still required to maintain the right level of chlorine. You can use a floater or skimmer in dispensing the tablets evenly. You can use the pool while treating it, as long as it has the right level of chlorine on it.

Includes a Stabilizer

Clorox tablets have a stabilizer that effectively reduces chlorine breakdown due to UV radiation, keeping the pool water safe and balanced for a long time.

3. Clorox XtraBlue 3″ Chlorinating Tablets

Clorox Pool&Spa XtraBlue 3 Long Lasting Chlorinating Tablets 25 lb

Clorox XtraBlue 3″ Chlorinating Tablets destroy and prevent green, black, and mustard pool algae, as well as corrosive, staining, and scale. These pills are simple to use and offer long-lasting sun protection.

6 in 1 Formula

The tablet 6 in 1 formula helps prevent corrosion and scaling and makes the water smooth. It keeps the water clean and comfortable to swim in. The Clorox XtraBlue 6 in 1 formula keeps water clean and kills bacteria. It also controls the production of algae.

Easy to Apply

The tablets help keep the water clean and maintain 1 to 4 ppm of free chlorine by adding tablets weekly. You can apply the tablets using a floater, feeder, or skimmer.

4. In The Swim 3″ Chlorine Tablets

In The Swim 3″ Chlorine Tablets

Trademark signature

This chlorine product is one of the industry-leading Chlorine tabs available on the market. It contains stabilized chlorine with its long-lasting sanitizing quality. Its available 90% chlorine is very much effective against active body bacteria burden. It is of the grade that helps to lock in microorganisms. It attacks the lipid cell walls and breaks into cells to kill germs. A grade of lesser quality may not afford this effectiveness.


Every 8 oz. part is packaged in easy-open bag preserves for use after a period of time from storage. It is advisable to buy chlorine close to the period of sanitation. However, the serving per purchase is not usually for a single-use. So the preservation of reducible chlorine in bags prevents degradation. Just keep the package container air-tight and dry, it preserves for a long. Prevent your pool/spa from cloudiness and prolong its hygienic identity.

Every appearance of living organics and other signs from water discoloration prompts the use of the best chlorinating agent. Technology in tablet design has made it eco-friendly so that the measure (PPM) available for effectiveness is maintained per serving.

You need to mind the safety of your commercial pool. Swimmers could be endangered at a risk from water-borne infections. Pool fun and safety should go along every time.

Like having life ring buoy, depth markers, shepherd’s hook, et al. all in place, chlorinating your pool is as much ideal.

The size of tablets is a perfect fit for floaters and other automatic chlorine feeders. Trichlor active ingredient of 99% content is suitable for any level of water hardness. It does not precipitate harmful by-products as a result of interactions. Every 1-2 tablet added to every 10,000 gallons of water provides a commendable best sanitary result.

5. Doheny’s 3 Inch Chlorine Tablets

Doheny's 3 Inch Swimming Pool Chlorine Tablets - 50 lbs.

90% Chlorine Potency

This Doheny’s product item has been in use for a long time. It has its credit of quality from recommendations by pool owners. Tablets contain 99% pure Trichloro-S-Triazinetrione in each stabilized tablet. This helps to maintain a level of chlorine that keeps its effective strength. 90% of chlorine content is preserved even after long-term storage. The item has its tablets each wrapped in a PVC UV-absorbing bag. This prevents the easy reduction of Chlorine. The reduction of chlorine reduces its effective quality after all.

Improved Technique

The tablets have also been designed with a special technique. Tablets are highly compressed to dissolve slowly and last longer. This has been achieved even without fillers and binders used in some others. Tabs have a durable consistency and pucks are not easily broken.

The bucket container in which the 50-pound chlorine is packaged has a child-proof locking lid. It proves resistance to the kids if placed anywhere in the household.

Perfect Dosing

The average above-ground pool uses 25Lbs per season while the in-ground pool uses 50Lbs. So, a single 50Lbs package can serve you a season without having to buy extra. The algicide content works effectively against algae, even when lichens develop. If you may explore the available chlorine products for pools, you’d find out that it is best-rated in swimming pool chlorine. All you need is to check for pool cloudiness after usage, it doesn’t exist. Not many chlorinating products can afford this.

Pools often get contaminated with organics from poo, pee, sweat, and saliva. The best way to fight such is to buy a chlorinating product that locks inefficiently on them. The best chlorine product that works best at a range of pH is ideal. For you not to worry in regard, a stability condition incorporated into Doheny’s is protective.

6. NAVA Pool Care 3″ Chlorinating Tablets

NAVA Pool Care 3” Chlorinating Tablets - 50 lb

Novel pool care product

Nava Pool Care Chlorine pool sanitizer has qualities adapted to every pool type. It is a top chlorinating product made in the U.S.A. It presents as tablets that leave no residue after use and reduces pool pH as well. Individually wrapped chlorine tablet kills bacteria and controls algae while protecting against organic contaminants as well. These individually wrapped chlorine tablets are fit for feeder and floater applications. They are also suitable for use with alternative devices such as ionizers, ozonators, and mineral feeders.

Highly soluble

In as much as you desire completely soluble chlorine for your pool, get this NAVA pool care product. It leaves no residue. Add 1 tablet per 10,000 gallons of water. This gives you the 1-3 ppm concentration that is required. Tablet has a 24-hour chlorine residual purification span. You can repeat as necessary per 24-hour to maintain chlorine at 1-3 ppm.

Easy to use/ Durable

The bucket container has an easy-open feature. It is also has weatherproof and you can store it outside easily enough. The cellophane bag material is sturdy and needs to be torn open to let out tablets. So tablet dosage is hassle-free and kept throughout transport and storage. You don’t have to bother about its dispersibility, especially when you are using a floating dispenser. The flocs from dissolution have a density that enables its adequacy in circulation.

Chlorine does not build up in one area and near the edges. If it were so, such would bleach your pool liners. But this chlorine product ain’t so.

7. Kem-Tek 177 1-Inch Chlorinating Tablets

Kem-Tek 177 1-Inch Chlorinating Tablets for Pool and Spa

A spa deserves a good worth of sanitation. There are five general types of chlorine products sold for use with recreational water. Lithium hypochlorite (a fast-dissolving granule) is the most costly of the group. However, it’s the safest to handle. Also, it can be stored for a long period without losing its potency.

Stabilized Chlorine

When spa cover is off, UV-rays from sunlight rapidly depletes any form of chlorine that hasn’t been ‘stabilized’ e.g Lithium hypo. One ppm of unstabilized chlorine will dissipate in 15 minutes or less under direct sunlight. Kem-Tek 177 1″ Chlorinating tablets are simply the best tablets for use with thought for the concerns above.

The product contains just chlorine without any preparation as an algicide. Algae do not have the propensity to grow in spas as much as in pools.

The most convenient effective and easiest form of pool chlorination is with Kem-Tek 1″ chlorine. It has a slow-dissolving property. And it is likewise stable in terms of water concentration and its long-lasting sanitation. It is the best Chlorinating product that is easily affordable.


Tablets are durable and easily dissolved in pool water. The influence of the summer has an annoying effect on chlorination. Precipitation occurs and a fast burnt-out of chlorine does not favor treatment. But this chlorine tablet product contains a UV-ray protective agent.

Get the titer of chlorine after 24 hours of using the chlorine tablet in your backyard pool. You should attest to a result of its standard. The 1-3 ppm effective measure is maintained.

Things To Consider Before Buying Best Chlorine Tablets For Pool

You have already known that chlorine used in swimming pools comes in either tablet, powder, or liquid form. There are some nuances you should be aware of before pulling the trigger on a purchase.

Each form has its benefits and downsides. Different price points, applications, and overall effectiveness in specific situations draw a margin as well. There is no one-size-fits-all.

Here are a few pertinent factors to consider when purchasing a chlorinating product;

Nature of Chlorine Substance

Chlorine sanitizers are typically used with a dispenser that allows them to be released into your pool consistently over time. The easiest form of chlorine to use is in tablets. It is friendly to most domestic pool owners. It is eco-friendly as well for commercial pool owners. Tablets can also contain other helpful substances such as algicide and water clarifier, eliminating the need to purchase and add them independently.

Stabilized or Unstabilized Chlorine

  • Unstabilized chlorine has not been mixed with cyanuric acid (CYA). This chemical shields your chlorine from the sun’s ultra-violet (UV)-rays. (UV)-rays decrease the overall burn rate of your dosage.
  • Is your swimming pool outdoor?

Not all swimming pools are outdoors, exposed to the sun. Unstabilized chlorine can be used to the same effect in the right circumstance.

Besides, you can add the CYA at will when needed. This type of chlorine has a shorter lifespan than stabilized chlorine. It can be used in large doses to shock your pool, or even as an emergency top-up. It quickly restores falling chlorine levels.


  • Fast burn rate when exposed to the sun
  • Typically used with indoor or shaded pools
  • Used to shock pool or for top-ups
  • Stabilized Chlorine as you guessed it, is chlorine that has been mixed with cyanuric acid (CYA). It protects your chlorine from the sun’s ultra-violet (UV) rays. Again, the added acid is important for swimming pools that are frequently exposed to the sun. Having it mixed in with your chlorine just makes your life easier when it comes to dosages.

However, most tablets come with stabilized Chlorine. The essential chemicals have been added and balanced to work efficiency.


  • Slow burn rate when exposed to the sun
  • Typically used with outdoor pools
  • Easier to manage

A common example of stabilized Chlorine Compounds is Lithium Trichlor. This type slightly reduces the pH and total alkalinity of your pool water.

Lithium Trichlor, simply called “Trichlor” comes in powder and sometimes tablet form, and it contains around 90% available chlorine. This is a strong, dry structure with the most elevated chlorine content.


Chlorination is the cheapest and generally most effective method of achieving sanitation of pool water. To inactivate the pathogenic microorganisms that remain after use, a sustained release effect from a chlorinating substance, a tablet, is ideal. All of the listed chlorine tablets are cost-effective and eco-friendly. There is a little margin in the price points. This is however due to the quantity of chlorine present in pounds of tablets. The active ingredients are most essentially the same. If you need the serving for a small size backyard pool, you may consider buying in low-pound quantities. A product like the 4Lbs quantity might serve you best for the sanitation period. A commercial pool may need a stock of large quantity, hence higher cost. The frequency and length of treatment have to be on the high side for effectiveness.

How to add Chlorine Tablets to Your Pool?

You can add the chlorine tablets using the following methods:

Floating Chlorine Dispensers 

As the name implies, floating dispensers float above a pool depositing chlorine. They are mostly passive and flow with the currents. However, if they become caught, they can release an excessive amount of chlorine in a single spot, so choose a specific dispenser to keep moving. 

Automatic Chlorinator

In general, this is the best method. Automatic chlorinators allow you to establish a special dispensing rate depending on your pool’s demands, and replenishing new tablets is relatively easy. 

Pool Skimmer Some skimmers are compatible with chlorine tablets. The tool provides a consistent flow of water over the pills. But, the tablet will continue to dissolve even if the filter is not running, which could result in highly corrosive water and damage tool.

Benefits of Adding Chlorine Tabs

The benefits of using chlorine tabs are as follows:

  • Tablets are much easier to use. All you need to do is add it on a skimmer or floater, and you are done.
  • Unlike granules that require accurate measurement, chlorine tabs are premeasured, so you don’t have to measure again. You need to know the number of tablets to add to your pool.
  • Because chlorine tablets are larger, take longer to dissolve, are stabilized, and may be used with a feeder, they can sterilize the pool for longer periods.
  • You will be able to maintain and adjust the chlorine level in the pool more simply if you use pool pills in conjunction with a feeder.
  • It helps you save time and money. 
  • No need for accurate measurement as it is premeasured. 
  • Administering it or adding it in the water is less tedious compared to other methods. 
  • You can swim while the tablets do their job in cleaning the water. 

You can clean the waterless often as it works longer.

Frequently Asked Questions – (FAQ)

Does Chlorine Prevent All Water Infections?

Chlorine in swimming pools kills the germs that may easily be contracted as diseases. Although it takes time. Chlorine in properly disinfected pools kills most germs that cause water infections within minutes. However, it may take longer to kill certain germs owing to some factors. Anything that can reduce chlorine levels in pool water may be a cause. Examples are sunlight, dirt, debris, and material from swimmers’ bodies (organics). Chlorination and healthy swimming behaviors are needed to protect you and your family from germs getting in the pool.

How Long Do I Wait After Chlorination before I Use Pool?

It is sheltered to utilize your pool after synthetic compounds have scattered all through the pool. It usually takes 15 minutes to one hour. When shocking your pool, wait until the chlorine levels drop to recommended levels.

Do I have to Remove the Chlorine Tab Wrapper before Use?

Try not to put chlorine tablets straightforwardly into the pool. They will stain and etch the pool plaster esp vinyl liner. Simply remove the tab from the bucket and leave it in the wrapper and place it in your pool. You need to use dispensers although.

How can I reduce the Itchy Skin Effect from Chlorination?

Clear off all appearances of dirt and organic debris from your pool before Chlorination. Chloramines cause itching to the skin. Chloramine is formed when chlorine reacts with body contaminants. Keeping the level of contaminants low will reduce chloramine levels.

Why need chlorine tablets?

Chlorine tablets are simple to use and dispense chlorine into your pool water at a much faster and more constant pace than granules. Using granules takes much more time because you must measure and determine the exact amount. The tabs can be dispersed in the water in different methods, and you can choose what suits you best.

Are chlorine tablets suitable for a pool?

With the above benefits mentioned, a chlorine tablet is a good option for your pool. Compared to other chlorinating water pools, this method is much easier and more effective if you know how and what tool to use.

What do chlorine tablets do?

Chlorine Tablets are a popular water disinfectant that kills most viruses and bacteria in water and can treat up to 50000 liters. These water purification pills can also disinfect water for cleaning and washing fruits and vegetables and treating drinking water.  Chlorine tablets allow you to maintain pool water clean while performing fewer water tests and modifications.

Can you swim in a pool with chlorine tablets?

Yes, you can swim in a pool with chlorine tablets as long as the tabs added into the water are the right amount. Too much chlorine may cause the following:

Toxins can be absorbed into the skin.
It may irritate the skin and can cause rashes such as eczema.
It is possible to get burning and itchy eyes. 
It can trigger or worsen a range of respiratory disorders like asthma.
Has a bleaching effect on hair and clothing.


You can now make a smart choice of the best pool chlorine tablets having gone through the review. I recommend the products itemized in this best swimming pool chlorine tablets review. They stand the test of time and have gained good reports from many pool owners. You have invested a lot in your pool, so the best cleaning chemical is not altogether overmuch. When your pool/spa appears to be ‘germinated’ the best cure is a pound of chlorine tablet!

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