Ozonator For Hot Tub And Spa – Best Ozone Generator Reviews (2021)

Since I was a child, I would be seen fiddling with electronic devices, pulling them apart and then putting them back together to see how they work. I have always been interested in the physics of things, and this is what drew me to water treatment and pool maintenance too.

So, when my friend Glenn and I began thepoolcleanerexpert.com, a website for all pool treatment issues, the focus was not only on how to maintain your pool but also the science behind it. Ozonator Hot tub is the perfect amalgamation of that science and practicality. This article is a quick guide to hot tub Ozonators.

What is a Hot Tub Ozonator?

An Ozonator hot tub is a device that can reduce the need for chemicals in your warm tub maintenance regime. The device emits an intense UV/CD light, which splits oxygen molecules in the water into two separate, free oxygen atoms. When the free oxygen atoms interact with regular oxygen atoms, it produces ozone. The ozone then works on purifying the water and killing contaminants.

As you may have learned in high school chemistry, ozone is a natural sanitizer. It can kill the bacteria in your tub without needing to use any strong chemicals. The ozone released by the Ozonator can work beautifully with some simple sanitizers like chlorine and bromine. It can enhance the effectiveness of the two chemicals.

It manages to free up combined chlorine and bromine so that they can be reused. This way, you don’t have to keep adding more sanitizer – the same batch will last you for a longer time. It will also save you money by diminishing the need to buy more reliable, more expensive sanitizer.

Which is the best ozonator hot tub installation?

#1. QCA Spas Ozone Generator

Ozonator hot tub-QCA Spas Ozone Generator

Features of the product

  • Easy to install
  • Compact design
  • Highly effective

This is one of the most competent Ozonators on the market.

It has an extremely compact design, as its dimensions are 8×8 inches.

The Ozonator is also easy to install, as it comes with an instruction manual. It is shockproof in water.

Moreover, you can install the Ozonator in almost any size of the hot tub on the market.

It also comes with additional accessories that are necessary to install the product.

The Ozonator is also anti-corrosive, which reduces maintenance costs.

When it comes to an Ozonator, efficiency remains the main question.

It has a highly reliable system that offers you crystal clear water every time you use it.

The Ozonator is also straightforward to use compared to other products on the market.

Once you have installed the Ozonator, you just have to turn on the electricity and leave the rest to the product.

Irrespective of these points, this Ozonator fails to last for a long duration.

Usually, it lasts up to a year.


  • Instruction manual
  • Easy to use
  • Highly effective
  • Low repair cost


  • Not extremely durable

#2. DEL Ozone Hot tub and Spa Ozonator

Ozonator hot tub-DEL Ozone Hot tub and Spa Ozonator

Features of the product

  • Effective ozone generator
  • Uses corona discharge technology
  • Easy to use
  • Additional accessories

It is one of the CD Ozonators that eliminate the most significant number of pollutants in a hot tub.

Ideally, the product removes over 95% of harmful byproducts, which lead to water contamination.

CD Ozonators also remove harmful chemicals such as bromine and many more.

It does this by splitting oxygen molecules into free oxygen atoms.

The ozone corona discharge technology used by CD Ozonators targets the oxygen molecules in the water and cleans the water by splitting these molecules into two smaller oxygen atoms.

This process of producing oxygen atoms sanitizes the water, killing bacteria.

This also reduces the consumption of chlorine or the need for shocking the hot tub.

Therefore, the overall cost of maintaining the hot tub reduces in the long run.

The product also comes with additional accessories like a valve, which makes the installation process extremely easy.

You can even check the instruction manual for the proper installation of the product.

The product has a compact design, due to which it requires a small space.

However, this also limits the capabilities of the Ozonator.


Well, the product has been found ineffective in hot tubs above the capacity of 750 gallons of water.

Therefore, only buy this product if the hot tub capacity is under this limit.

Overall, the products offer you an excellent experience for a long duration.


  • Simple installation
  • Effective cleaning via corona discharge ozone
  • Compact design


  • Ineffective over 750 gallons

#3. Prozone Nema Cord Ozonator

Ozonator hot tub-Prozone Nema Cord Ozonator

Features of the product

  • Highly durable
  • Easy to use
  • Effective generator

This product is one of the most durable Ozonators in the market.

In ideal conditions, it can last up to 2 years.

It is a highly effective ozone generator, as it eliminates major pollutants in hot tub quickly.

The product has a little larger size as compared to the most competent product, but in replace of that. It has a larger capacity.

You can install the Ozonator in any hot tub under the capacity of 800 gallons of water.

Above that, the efficiency of the product decreases significantly.

Thus, you should not go for this product in case you have a 1000 gallon hot tub.

This product also comes with various accessories required to install it in the tub.

However, it does not have an instruction manual, which makes it a little challenging to install in a hot tub.

Overall, the product is entirely safe to use and offer effective cleaning of the water.


  • Shockproof construction
  • High durability
  • Easy to use
  • Highly effective


  • Challenging to install
  • Effective under 800 gallons

#4. Prozone PZ1 Ozone System Generator

Ozonator hot tub-Prozone PZ1 Ozone System Generator

Features of the product

  • Low maintenance
  • Easy to use
  • Sturdy body

Usually, Ozonators overheat due to operating for a long time.

It leads to various issues like short-circuiting, which can even lead to an electric shock in the tub.

However, this product has been designed such that it does not overheat.

It also has a sturdy body, which prevents the entrance of water in the system.

Therefore, the product is highly durable when appropriately maintained.

The product also has an in-built indicator, which gets activated when the system is ON.

It is also effortless to install the product, as you can follow the instruction manual.

However, it has certain limitations.

First of all, you cannot install the product in a hot tub over the capacity of 800 gallons.


It is because the product is highly ineffective above that range.

You also need to make sure that you maintain the product frequently for proper efficiency.

The product also comes with low power as compared to other products in the market.


  • Power-efficient
  • Easy to use
  • Effective cleaning
  • Highly durable
  • Shockproof


  • Ineffective for more than 800 gallons

#5. A2Z Aquatic Ozone Generator

Features of the product

  • Most effective
  • Easy to use
  • Compact design

This product is one of the most effective ozone generators on the market.

It can eliminate almost every pollutant in the hot tub and maintain excellent water quality.

The product also increases the efficiency of the filter of the hot tub.

It has a small size, due to which it requires a small space.

The product is also straightforward to install. Just check the manual guide.

It eliminates all of the pollutants that can lead to skin irritation.

Therefore, you won’t face any issue regarding the effectiveness of the product.

However, the product does not work effectively in hot tubs above the capacity of 200 gallons of water.

Yes, that is extremely low compared to other products, but it compensates by increasing efficiency.

You can even install multiple Ozonators in a large capacity hot tub.

The product comes with all the necessary accessories required for installation too.

Moreover, the product consumes a low amount of power, which reduces electricity bills in the long run.

Choose this product only if the capacity of the pool is under 200 gallons of water.

Even in the case of multiple generators, don’t install more than three Ozonator in a hot tub.


  • Simple installation
  • Highly effective
  • Low power consumption


  • Ineffective over 200 gallons

#6. Master Spa Auto Sense Ozonator

Master Spa Auto Sense Ozonator

Features of the product

  • Automatic cleaning
  • Easy installation
  • Compact design

This Ozonator is one of the unique generators on the market.

It has an in-built auto sensor, which automatically activates the product whenever the level of pollution is above a limit.

The product is straightforward to install. You can just check the instructions for proper installation.

There are instances when the size of the generator can bother you in the hot tub.

However, this product has a minimal size, due to which it requires a small area for installation.

Moreover, the product does not come with additional accessories that are required for the installation of the product.

Therefore, you will have to buy them which can be troublesome.

The product also offers you excellent durability, but it cannot be counted among the most durable products on the market.

Choose this product only if you are willing to try something new in an ozone generator.


  • Shockproof
  • Easy to use
  • Effective cleaning
  • Fine durability


  • Does not come with additional accessories

Why Do You Need an Ozonator?

Ozonators are useful for a variety of reasons. The following are only some of their advantages:

  • You can install an Ozonator once and save money on buying expensive chemicals throughout the year. On the other hand, continuously buying chemicals could end up costing you more than installing and running an Ozonator would.
  • If anyone who is using the hot tub is allergic to pool chemicals (a common allergy), an Ozonator is a perfect way to ensure the water is clean. You do not have to use any substances that do not sit well with you or your loved ones.
  • It can reduce the effects of many compounds and bodily fluids in the water, like deodorant, sunscreen, sweat, makeup, soap, saliva, urine, etc.
  • The water will sparkle like never before because ozone is a natural flocculant. It will clump all the impurities together, which the filter will dispel from the water. The oxygen byproduct of the ozone will make the water, quite literally, the sparkle in the light. If you have an outdoor hot tub with access to natural sunlight, the water will sparkle even more.

How Often Should You Use a Hot Tub Ozonator?

Ozonator Hot Tub

Now, can you keep your Ozonator on at all times? Admittedly, that would rake up an enormous electricity bill. After all, the physics behind an Ozonator is fascinating, but there is no creating ozone without the consumption of electricity.

There is no hard and fast rule about how often you should be using the Ozonator. But if the hot tub is being used frequently or if there are more than a few people using the tub at once, you may want to leave the Ozonator on. On average, if you run it for 3-4 hours in a 12-hour day, that should produce enough ozone to keep the water clean and sanitized. If on a specific day, the usage is higher than usual, you can run it for a few extra hours.

Is a Spa Ozone Generator Environment-Friendly?

Now, you know that the ozone layer is what protects our atmosphere, but anything in excess can be harmful. Inhaling ozone can damage your lungs. Too much ozone in the air around us, therefore, can be detrimental to health even though ozone is an essential component in protecting our atmosphere.

While ozone generators used to curb pollution may be doing more harm than good but ozone dissolved in water is perfectly safe to be around. Any excess ozone is converted back to oxygen, so you do not have to worry about inhaling ozone or releasing excess ozone into the air around you.

Ozonator Types

There are two main types of ozonators available in the market. UV ozonators and CD (corona discharge) ozonators. CD ozonators, however, are becoming more popular now as they are more energy-efficient than the UV variety. There are also many advances being made in the field of corona discharge, making it more sought after technology. CD ozonators have longer lives, are more energy-efficient, and are compatible with most hot tubs, among other things.

Ozonator Hot Tub – Pros and Cons

Ozonator Hot Tub-Buying Guide

As with anything else, hot tub ozonators have several pros and cons too:


  • You get to save a lot of money on unnecessary and expensive chemicals, which could irritate your skin and eyes if overused.
  • It is long-lasting and easy to use. Having an Ozonator is more convenient than running to the store now and then because the hot tub chemical reading is not balanced, and you need to buy more sanitizer.
  • It is a natural solution that is probably better for you than sitting in a tub full of chemicals.


  • If the Ozonator is not installed correctly, not only have you spent money on buying the device but now also have to pay for chemicals to treat the water since the Ozonator is malfunctioning.
  • The ozone can damage your hot tub cover, even if the ozone being released is mild. You will have to take the cover out for a few hours every week to increase its life. Alternatively, you can also buy a light blanket to protect your cover.

Spa Ozonator Buying Guide

Spa Ozinator Installation

First of all, you need to make sure that the installation of the ozone generator is straightforward.

You can ensure this by looking for an installation guide with the ozone generator.

Spa Ozonater Durability

The second thing that you must look for in an ozone generator is its durability.

It is an essential factor, as you will be using the Ozonator to reduce the maintenance cost.

You can check on the durability of an ozone generator through the reviews.

Spas Ozonator Hot Tube Effectiveness and safety

The last factor is the effectiveness of the ozone generator.

You need to make sure that the ozone generator is capable of installation.

The ozone generator should be able to eliminate pollutants.

Since the ozone generator will be installed in the water, it should be shockproof too.

Spa Ozonator Frequently Asked Questions

How do you replace a hot tub Ozonator?

The best way to replace a hot tub Ozonator is to check the manual guide.

For the removal of the Ozonator, you need to check and follow the steps of the guide in reverse order.

How to Install an Ozonator?

Most new hot tubs come equipped with a setting in case you want to install an Ozonator. It should have all the necessary outlets to mount and plug in your Ozonator. If not, check your hot tub’s manual to see if there’s a workaround. You may need to get some additional plumbing work done. The following are the steps for installing an Ozonator, but before you attempt to install the device, ensure it is the correct voltage for your hot tub:

Mount the Ozonator Hot Tube

You will need to mount the Ozonator at a place where it will get good airflow. Usually, this is underneath the spa cabinet or perhaps even on a wall or other dry place in the hot tub room. Try to place it directly above a water line. Most Ozonators should also come with a check valve to prevent any backflow that could damage your device. Check the manual thoroughly to see how the device should be placed.

Connect the Ozonator Tubes

A single tube should connect to the jet system and allow the ozone to be created to be introduced into the water. When the Ozonator is not installed, the tube will let water flow to the jets. Cut through the tube and install the Ozonator inline. Use hose clamps to ensure you get the right fit.

Install the Ozonator Check Valve

As mentioned above, your Ozonator requires a check valve that will stop the backflow of water into the device. This could potentially destroy the Ozonator. Often the valve is built-in, but some other times, it may have to be installed separately.

To install it separately, cut through the tube leading to the jet tubing. Insert the valve and then secure it in place using the clamps.

Ozonator Wiring

Ozonators are typically wired for 110 or 220 volt systems. You should rely on your user manual for the large part as this step may differ from unit to unit. If you are too out of depth for this step, bring a professional electrician on board to finish the rest of the installation.

Set the Timer for the Ozonator

Install a timer if one is not already installed. Your device must run for at least three hours in every 12 hours. The longer the tool runs, the more effective it will be in cleansing your water. If the pump does not filter, ozone will not be introduced into the water system.

Here’s a detailed description of how to install your Ozonator.

Do Ozonators work in hot tubs?

Whether or not an Ozonator will work entirely depends on the quality of the ozone generator and the capacity of the hot tub.

If we assume that you choose a high-quality ozone generator and install it in the right capacity of the hot tub, then, yes, they work well.

What is the best spa Ozonator?

There is no best Ozonator on the market. Whether or not an ozone generator depends on your expectations.

However, in the case of ideal expectations, we would recommend the ‘QCA Spas Ozone Generator.’

This ozone generator offers you a great combination of correct cost, advanced features, and high effectiveness in terms of cleaning the water.

How much is an Ozonator for a hot tub?

The price varies as per the ozone generator you choose. If you choose an Ozonator from our list, then it will cost you under 100 dollars.

However, other Ozonators may cost you up to 200 dollars.

You need to remember that the cost of an Ozonator Hot Tub has nothing to do with its effectiveness.

However, it may affect the durability of the Ozonator.

Therefore, you must go for costlier Ozonators, if you are looking for a highly durable generator.

Ozonator Hot Tub Conclusion

Every point in this blog was shared after intense research and experience with Ozonators. We have also shared the most important factors that you must look for in a hot tub Ozonator.

Here are the top three Ozonators on our list.

The first product is theQCA Spas Ozone Generator.’

This product has a compact design and offers effective cleaning of hot tub water.

The second product on our list is theDEL Hot tub Ozonator.’

It comes with additional accessories, which makes it extremely simple to install compared to other ozonators on the market.

The third best product on our list is the ‘Prozone Nema Cord Ozonator.’

This product is one of the most durable Ozonator models on the market. It even has a sturdy body, which is shockproof in the hot tub water.

Most new hot tubs already come installed with an Ozonator, or at least highly recommend you install an Ozonator. While the device will not fully replace the use of chemical sanitizers, it will reduce its requirement to a large degree. Once you have installed an Ozonator, you need to keep checking that it is functioning correctly.

Only by continuing regular checks on it will you be able to maintain it for a long time. Use ozone test kits regularly to see if the system is generating ozone. If the levels are lower than expected, check if there is a blockage in the device’s delivery system. Also, examine the check valve regularly to prevent any leaks and backflow. Enjoy a hot spa!