15 Best Hot Tub Chemicals of 2022 | Reviews & Guide

Best Hot Tub Chemicals 1

The main function of all hot tubs is to deliver a fulfilling spa experience. Glistering clean spa water ensures that you have a mesmerizing experience in your bathtub.

However, if you pay no attention to maintaining the quality of the hot tub water, you will have the same experience you desire. Even though your hot tub contains a smaller volume of water than your swimming pool, it still requires the same levels of care and diligence.

The heated water changes the chemical balance consistently in your hot tub. Therefore, you need the help of chemicals to maintain water chemistry by eliminating contaminants and reducing unpleasant odors.

Several types of chemicals, such as bromine and chlorine, help in clearing unnecessary microorganisms from your spa water.

The significance of cleaning your spa water calls for the use of the right sanitizer. To choose the right sanitizer, it is crucial to understand the basic features of the best sanitizers available in the market.

Depending on the usage and size of the tub, you may have to choose from a variety of hot tub chemicals from time to time. However, it is crucial to test the water first before choosing a type of chemicals. Here is a list of reasons for requiring chemicals.

  • Chemicals help in maintaining the right alkalinity levels. The maintenance of the proper alkalinity levels will prevent fluctuations in the pH levels.
  • The chemicals also help in determining the proper pH levels, depending on whether you need to increase or decrease them.
  • A sanitizer also helps in getting rid of bacteria and viruses. These contaminants usually survive and thrive in warm water.
  • Chemicals also break down any organic contaminants in your tub.

Now that you are aware of the significance of the use of chemicals, here are the best sanitizers that you can use to clean the hot tub.

Best Hot Tub Chemicals

Best Hot Tub Chemicals 2

1. Leisure Time Spa Sanitizer Spa 56 Chlorinating Granules (3033A)

The 30330A from Leisure Time is one of the few products that are known for its efficiency. The sanitizer takes no time to dissolve in the water and killing the germs within, removing the impurities from the water.

Leisure Time 22337A Spa 56 Chlorinating Granules for Hot...
  • BENEFITS: Destroys organic contaminants to maintain clean,...
  • USE: Specifically formulated for spa and hot tubs; can be...

Experts also recommend this product because it doesn’t take up the natural balance of spa water by maintaining neutral pH levels.

Adding the right amount of sanitizer to specific gallons of water is enough to give shock treatment to the tub. The hazardous chemicals used for the shock treatment means that the pool will be ready for use two days after the treatment.


  • Works for spas, hot tubs, and preheated pools
  • Maintains the natural pH levels in the water
  • Helps in giving shock treatment to the spa and hot tubs
  • The user will have to wait to use the pool after treatment 

2. Clorox Pool and Spa 23006CLXCA

This Clorox pool and spa granules dissolves super-fast and helps in removing all types of impurities and contaminants from the water. The sanitizer is also used for providing shock treatment too, the chemical leaves the pool germ and bacteria-free while preserving the calming blue color.

Clorox Pool&Spa XtraBlue Chlorinating Granules ,6 Pounds
  • Quick-dissolving, dual action pool chlorine granules that...
  • Pool sanitizer and shock

The minute particles responsible for chlorinating are well protected against the scorching beams of sun and work equally well in salt and chlorine pools and hot tubs.

Therefore, if your spa is becoming a hub for all kinds of bad odor and irritating elements, this super cleaning agent is the product you need.


  • The quick-dissolving granules speed up the cleaning process
  • Product ensures that the pool is germ-free and restricts the development of algae in your pool
  • Instructions on the sanitizer are easy to follow
  • Not suitable for plastic spa tubs

3. SpaChoice 472-3-5081 Chlorine Granules

If you are looking for a product that has chlorine granules that dissolve completely in water without taking much time, then this product by SpaChoice is the ideal solution. The product ensures that your spa is clean and tidy through the help of chlorine granules the ultimate enemies of bacteria.

Spa Choice 472-3-5081 Sanitizing Granules Hot Tub Chlorine...
  • Dissolves Quickly and Completely
  • Stabilized Spa Chlorine

The product helps in the removal of bacteria from your pool while preventing the regrowth of algae.

The product site has a user guide, which you can download easily. Another good quality of the product is that it comes with complete technical specifications making it easier for you to apply them appropriately.

The spa sanitizer, however, fails to maintain the balance of chlorine in the pool or spa on most occasions. Additionally, the product is also not ideal for plastic bath and spa tubs.


  • The combo of HEPA and 2-tier radial cyclone offers absolute vacuuming of the tiniest particles
  • Light body and ergonomic design ensures convenient use
  • Compatible with dusting brushes
  • No extension hose provided to deal with soft spaces
  • Not usable while on charging

4. Spa Essentials 32130000 Granules

This is one of the products that don’t need pre-dissolving for the granules to dissolve quickly. The product is convenient to use, and the concentrated formula makes it even more effective.

The chlorinating granules, in addition to working as a sanitizer, also serve the purpose of an oxidant. This not only saves you from the hassle of choosing and buying multiple products but also saves you precious money.

The perfectly stable chlorinating impact makes these granules stand out from those of the other products in this compilation. The granules not only clean the pool but also make it soothing for the human skin.


  • You don’t need to speed up the cleaning process to dissolve the chlorine granules
  • The product is multipurpose and works as both a sanitizer and oxidizer
  • Completely stabilized chlorinator and has no impact on your skin
  • Relatively expensive 

5. Leisure Time Spa Tablets

Different from the other hot tub chemicals, these tablets are easy and convenient to use. The tablets are round in size and measure a total of 1-inch. The tablets also fit the floaters and feeders of the spa perfectly, helping in the continuous release of bromine.

LEISURE TIME 45430A Brom Tabs Bromine Cleanser for Spas and...
  • BENEFITS: Dantabrom chemistry provides 10% more active...
  • USE: Immerse the test strip for 2 seconds, remove with the...

The tablets are sound on dantobrom chemistry and are similar to a bromine sanitizing system. These tablets continuously disinfect your pool by killing germs and bacteria. The tablet diffuses in a way that it distributes bromine equally in the water and maintains a stable level.


  • Convenient and easy to use, as it can fit in most spa floaters and feeders
  • Removes all types of germs and bacteria while disinfecting the pool
  • Ensures the maintenance of adequate bromine levels in the pool
  • These tablets often crack and dissolve quickly and work more like a powder than a tablet 

6. Spa Choice Brominating Sanitizer Tabs

The presence of 98% active ingredients in the bromine tablets makes them very effective in killing bacteria and disinfecting the pool and spa.

SpaChoice 472-3-3011 Bromine Tabs for Spas and Hot Tubs...
  • Sanitizer for Spas and Hot Tubs
  • Bromine is an alternative to chlorine as a way to sanitize...

The tablets are slow to dissolve and generally last longer. The products distribute bromine appropriately in the water and ensure that they don’t leave behind any bad odor, making the pool and water look and feel good.

 The large tablet container also comes with a tight lid which helps in keeping the tablet stay fresh for more than a year. The only thing to consider, however, is that the container is tossed in storage, delivery, and placement which often results in broken tablets and a waste of money.


  • Tablets are reliable and effective, with 98% active ingredients
  • Slow dissolving process ensures that there is no bad odor left behind
  • Comes in a large bucket with a lid on the top that helps in keeping the product fresh for a long time
  • The tablets often break down 

7. Hot Tub Spa Bromine Tablets

The “twin-packed” spa bromine tablets come with 98% active ingredients. These tablets are the finest available in the market since they work efficiently and are cost-effective too.

Clorox Spa 22005CSP Spa Bromine Tablets, 5-Pound
  • Slow dissolving sanitizing tablets
  • Reduces growth of bacteria

These bromine tablets are very effective and help in yielding the best results when it comes to killing germs and bacteria. The tablets keep your pool and spa clean and tidy by completely disinfecting the pool.

The tablets dissolve very slowly; by taking their time during the dissolving process, the tablets ensure that appropriate amount of bromine is in the water. 6 tablets per feeder in the water are enough to keep your tub clean and tidy for a month.


  • Product has high-quality bromine tablets with 98% active ingredients
  • Very effective in disinfecting the pool completely
  • Slow to dissolve and lasts longer, which means that you don’t need to refill them often 
  • Powdered granules of the product do not dissolve in water 

8. In the Swim Pool Bromine Tablets 8 lbs

The bromine tablets constitute of bromine and chlorine and dissolve very slowly. They also help in keeping the pool disinfected and save you from giving your pool another treatment, saving you money in the long-run.

In The Swim 1" Inch Pool and Spa Bromine Tablets - 8 Pounds
  • 1" Tablet. Each tablet weighs 0.5oz
  • Available bromine is 61% and percent available chlorine is...

The products are also ideal for small preheated pools and work quite efficiently for personal spas and hot tubs too. The products ensure that the water is soothing and gives the users a relaxing experience.


  • By dissolving slowly, the tablets help in saving money and improving results
  • Ideal for small pools, spas, and personal use
  • Helps in leaving the pool odor-free and smooth
  • Bromine tablets are not ideal for larger pools 

9. Leisure Time Spa Shock Oxidizer

This shock oxidizer from Leisure is the ideal solution for the removal of odor-causing ammonia in your spa. This product does not have chlorine and is efficient in eliminating contaminants and odors.

Leisure Time 45310 Replenish Shock Oxidizer for Spas and Hot...
  • BENEFITS: Multi-functional oxidizer treatment:...
  • USE: Add to your spa or hot tub after every use and once...

The shock oxidizer can destroy all types of microorganisms present in the spa or a pool. The product is compatible with bromine, chlorine, and mineral purification systems.  

The product is ideal for use and has positive feedback from the users. However, in comparison to this product from Leisure Time, the other hot tub chemicals constitute additional active ingredients that speed up the process of purification. This means that the user a lesser quantity of the other products to get good results. This may increase the overall cost of buying and using the shock oxidizer from Leisure Time.  


  • Product dissolves quickly to remove oils and residue
  • Product is suitable against organic materials that result in skin/eye irritation
  • pH levels are buffered to leave no effect on the internal pH levels of the pool
  • User is required to use high quantities of this product to guarantee good results

10. SpaGuard Enhanced Shock

If you are looking for a hot tub chemical that can shock, clarify, and work as a pH buffer, then you have hit the jackpot with the SpaGuard Enhanced Shock. The product dissolves quickly and is capable of delivering results in as little as 15 minutes.

Dyson V7 Trigger Cord-Free Handheld Vacuum Cleaner
  • Capacity (volume) - .15 gallon; Cord free; Hassle free; No...
  • Tools included: Mini motorized tool, combination tool,...

You can use the product with your brominated spas to get rid of unpleasant odors. You will notice the results in the form of the restoration of the water sparkle within minutes. However, users need to avoid using the spa too soon after using the hot tub chemicals, as it may lead to burning eyes.


  • Product is multipurpose and has four functions
  • Takes only 15 minutes for the SpyGuard to start working
  • Suitable for use with both bromine and chlorine spas
  • Users have complained of burning eyes, after using the spa too soon after treatment 

11. 2-Pack Oxy-Spa Oxidizing Shock

This product comes with the highest concentration of active oxygen, which makes it work quite impressively.

Spa Depot Oxy-Spa Chlorine-Free Oxidizing Shock for Hot Tubs...
  • (2) 1-1/2 lb. Bottles (3 lbs. total)
  • Granular Monopersulfate Oxidizing Shock

The non-chlorine oxidizing shock helps in eliminating residual soaps, natural oils, and deodorants from hot tub water.

Compared to other hot tub chemicals in the list, you can use the pool or bathtub several minutes after treating the water. People have complained of the color of water turning gray after several uses.  


  • Allows immediate use of the product after treatment
  • Capable of getting rid of lotion, perspiration, and cosmetic residue
  • Has the highest concentration of oxygen in this list, this adds more potency to the product
  • The pool water may look gray after use 

12. SpaGuard Spa Enhanced Shock

The shock oxidizer saves you from the use of additional chemicals, as it removes odor without forming white fungus later.

Many people recommend alternating between the use of chlorine and spa shocker. Not only is the product convenient to use but it is also very cost-effective.


  • You don’t need to use additional chemicals for the product
  • The users are free from issues such as white fungus
  • Product is cost-effective
  • User has to wait before using the pool after treatment
  • Not usable while on charging

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

Unlike the other hot tub chemicals in the list, the manufacturers of Kem-Tek 177 offer 24×7 customer support. 

Kem-Tek 177 1-Inch Chlorinating Tablets for Pool and Spa,...
  • The most convenient effective and easiest form of pool...
  • Slow dissolving and concentrated for long lasting sanitation

The product comes in various sizes and ensures the hassle-free chlorination of your hot tub. The product also prevents algae contamination in your hot tub.


  • Product resists crumbling
  • Chlorine does not burn down when exposed to the sun
  • Product provides adequate, long-lasting sanitation
  • One of the most accessible forms of pool chlorination
  • Product may lead to excessive foaming 

14. Spa Essentials 32305000 Brominating Tablets

The product ensures long-lasting protection of the spa water by controlling the bacteria within effectively. Those who are sensitive to sanitization can switch to this process by using it with the help of a floating feeder.

Spa Essentials 32305000-02 Tabs Hot Tub Bromine, 2-Pack
  • Spa Essentials Brominating Tablets are a spa and hot tub...
  • Compressed 1 in. bromine tablets provide long lasting...

The product ensures the safety of the spa water by maintaining the correct chemical levels. The product is safe to use and does not cause any skin irritation.


  • Product has a lesser pH sensitivity
  • Keeps the chlorine in your spa water odor-free
  • Easy to apply the product with the help of a brominator or tablet floater
  • Packaging is inconvenient 

15. Oxy-Spa- Non-Chlorine Hot Tub & Pool MPS

The presence of oxygen makes the product one of the most effective shock treatments you can ever implement on your bathtub. This unsurpassed quality enables it to outperform other brands in this range.

Oxy-Spa Non-Chlorine Hot Tub & Pool MPS Oxidizing Shock [6...
  • Economical 6 lb. Pail with Carry Handle & Child-Resistant...
  • Granular Monopersulfate Oxidizing Shock

The granular form of the spa water ensures that the water is clean without a glitch. The only visible glitch in the product is the quantity of chemical which accounts for only 70% of the total package.


  • Convenient packaging of 2 bottles 
  • Ensures optimal cleaning
  • Available in granule form
  • Chemical constitutes only 70% of this pack 


Regardless of the product you choose, a fact worth remembering is that hot tub chemicals play a crucial role in maintaining water chemistry. Care must be taken when it comes to regular maintenance of the hot tub. Not doing so can lead to severe technical and health problems for the user.

Therefore, rather than waiting for things to go bad, pick the right hot tub chemicals and start cleaning your hot tub.

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Best Hot Tub Chemicals

Anton Giuroiu

Anton Giuroiu

As a sheer idealist, Anton’s approach in architecture and content curation is tedious and meticulous this clearly reflects in his work here on Homesthetics with each and every article, after a decade of work on Homesthetics, the content creation guidelines still being improved every month.

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