Alternatives to Chlorine in Hot Tub

Chlorine is a chemical that was discovered way back in 1774 and it has been used to disinfect water ever since, but recently there are some alternatives that can do the same job as chlorine without having all of the side-effects. These products will be more common than chlorine by 2020 because they’re much safer for your health.,

The “natural alternatives to hot tub chemicals” is a topic that has been discussed for quite some time. There are many natural substances that can be used in place of chlorine, but they will not provide the same level of sanitization.

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Although chlorine is a common technique of sanitizing hot tub water, there are a few options available for individuals who want to avoid the odor or its harsh effects on the skin without losing cleanliness. Alternative sanitization procedures will mitigate some of the harmful effects of chlorine while still focusing on the undesired germs and bacteria that will be filtered out later.

The following are the best alternatives to using chlorine as a sanitizer in your hot tub: 

  • Bromine
  • UV light is preferred by Ozonators (eco-friendly, non-chemical)
  • Treatments with enzymes
  • Biguanide is a kind of biguanide (PHMB) 
  • The use of ionizers (reduce the amount of chlorine needed)

Knowing what options are available for keeping your hot tub safe, clean, and enjoyable to swim in is beneficial. Continue reading to learn more about these Alternatives to Chlorine and to decide which ones you wish to try.



Alternatives to Chlorine

Cleaning hot tubs with chlorine was formerly the sole option. Now that we know more about chlorine’s side effects, many people are seeking for alternatives that have the same sanitizing capabilities but none of the drawbacks. Here are a few options available on the market. 



Bromine is an excellent cleaning agent in hot tubs since they typically contain less water than big pools, and the higher temperatures of hot tub water work better with the chemical. 

It works in the same way as chlorine, but it’s less abrasive and harsh on the skin, making it a good choice for individuals who want the cleanliness of chlorine but don’t want the side effects.

Bromine also doesn’t have the same strong odor as chlorine, which may make relaxing in a hot tub more enjoyable. 

Bromine is sometimes more costly than chlorine. It, on the other hand, has less side effects on the skin, emits less odor, and may even be more effective than chlorine. It has the same (or better) cleaning power than chlorine while reducing chlorine’s harmful effects. 



Ionizers function by introducing a low voltage current containing copper and silver into the water, which attracts bacteria, pathogens, and other undesired particles, which are subsequently filtered out. 

To thoroughly clean a hot tub using an ionizer, you’ll need to augment it with another sanitizing chemical like chlorine or bromine. Using an ionizer, on the other hand, may considerably reduce the quantity of supplementary cleaning necessary. If you use bromine instead of chlorine, you may still get the advantages of using alternative sanitizers. 

An ionizer and bromine in combination may efficiently sterilize water, filtering out undesired pathogens and germs while decreasing the unpleasant effects on the skin and eyes, as well as the odor that is normally created by using just chlorine. 

Ionizers need continually moving fluids to function well, however given the tiny volume of water used in a hot tub and the amount of movement created by jets, this may not be a big problem for cleaning hot tubs compared to larger pools. 



Ozonators work by infusing UV rays into the water, which break down bacteria, germs, and pathogens, which are then fully filtered out. This technique of sanitizing hot tub water is well-known for producing a sanitary and very clean water environment. 

It’s also feasible to fully remove the use of additional chemical sanitizers like chlorine or bromine when using ozonators. It’s conceivable, though, that you’ll need to supplement with regular cleansers at first. 

This procedure cleans the water more completely than other cleaning processes, and it may need fewer water drainings or replacements. 

As a cleaning procedure, ozonators may be costly at first, but they will eventually deliver a higher degree of cleanliness while using less and less conventional cleansers. 



Treatments with enzymes are another effective supplement that can dramatically decrease the amount of bromine or chlorine needed to sanitize your hot tub. Enzymes bind and subsequently dissolves to the oils, bacteria, and other unwanted germs in the water that are then filtered out. 

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However, enzymes should be used in conjunction with other chemical sanitizers such as bromine or chlorine to properly clean the water. 

Enzymes may improve the efficacy of standard cleaning processes while also needing less typical cleaning chemicals. 

This implies that not only would this way of cleaning hot tubs lessen the harmful effects of typical cleaning chemicals, but it will also improve the effectiveness of the minimal quantity required. Keeping the skin and eyes clean and healthy while minimizing the damaging effects of these substances. 

Enzymes are recognized to be eco-friendly solutions for cleaning your hot tub, while they won’t replace typical chemical sanitizers.


PHMB (Polyhexamethylene Biguanide) is the most common approach to avoid using chlorine or bromine chemical sanitizers. 

PHMB will target undesired germs and bacteria, causing them to disintegrate or burst while encasing them in a thick coating that causes them to drop to the bottom of the hot tub and be swept away. 

This cleaning process is more costly, but it can improve the soaking experience, keep the pool cleaner than previous ways, and make the water kinder on skin, hair, and eyes by removing the need for other typical chemical sanitizers. 

Don’t Forget to Shock Your Hot Tub As Well

Whatever technique you choose to sanitize your hot tub instead of chlorine, you’ll almost certainly need to shock your pool with an oxidizer to keep it in good shape. 

Choose a shock technique that works well with your regular cleaning routine, and shock your hot tub once a week as a supplement to keep it thoroughly clean and safe to use. 

Why Use Alternatives to Chlorine

Because it’s reasonably inexpensive and excellent at cleansing the water and ensuring there are no hazardous germs, chlorine is one of the most often used hot tub sanitizers. However, for some swimmers, the chlorine that flows through the water may cause skin irritation, eye discomfort, and a foul odor. 

For some swimmers, any of these elements might be a deterrent. Chlorine sanitizers may make the water highly unpleasant, especially in hot tubs, where it’s more customary to soak and remain motionless in the water for a lengthy amount of time. 

If you have a hot tub but discover that the chlorine makes you not want to use it, this sanitizer is preventing you from enjoying your investment. 

Although chlorine is a common and conventional technique of sterilizing hot tubs, there are alternatives that may be used in conjunction with it or even completely replace it. 

It’s possible to completely stop using chlorine, but even using less chlorine by incorporating a different sanitizer that’s compatible with chlorine can drastically reduce the negative effects of chlorine and make you want to spend more time soaking in your hot tub, all while maintaining high sanitation standards.

Last Thoughts

If you want to minimize or eliminate the quantity of chlorine you need to clean your pool, you have a lot of possibilities. 

Traditional chlorine sanitizers are compatible with some of these approaches. Sanitizers like as ionizers and enzymes may help minimize the amount of harsh chemicals needed to clean your pool properly. You’ll be able to keep your house clean while eliminating the negative effects of soaking in chlorine-treated water.

Make the most of your hot tub by soaking and relaxing without worrying about the effects of chlorine on your body or the cleanliness of the water. There’s no reason to compromise when there are so many chlorinated alternatives available. 

Check out some of our hot tub articles for safety recommendations like how to avoid electrocution and what age is the safest to be in a hot tub.


The “best chemical free hot tub treatment” is an alternative to chlorine. This treatment uses a number of different ingredients that are safe for the environment and your family’s health.

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