Updated September 05, 2019 by Daniel Imperiale

The 6 Best Pool Ozone Generators

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This wiki has been updated 18 times since it was first published in February of 2017. If you want to keep your pool crystal clear and sparkling clean at all times, simply adding chlorine regularly may not be enough. Utilizing an ozone generator as part of your sanitation system can keep your water looking and feeling great, while helping to minimize your need for bad smelling and potentially harmful chemicals. When users buy our independently chosen editorial picks, we may earn commissions to help fund the Wiki. Skip to the best pool ozone generator on Amazon.

6. Prozone PZ4

5. A2Z SP-5G Swimming

4. Prozone PZ2-4V

3. Del EC-40

2. A2Z SP-3G

1. Prozone Products PZ7-2HO

Special Honors

Ozone Joe's OJ-30MR If the thought of a high voltage corona arc is a little unsettling to you, this model relies instead on UV light to create O3, which means it's a little bit safer to use, and it consumes less electricity. That makes it a smart choice for the eco-conscious consumer, and it claims it can effectively treat up to 30,000 gallons. ozonejoes.com

CMP Del This is reliable corona arc model that's ideal for homeowners with limited space, as it's thin and easy to mount on the inside wall of a shed or garage. If you don't have an interior that can accommodate it, that's no problem, as it features a weatherproof housing, allowing you to set it up just about anywhere. c-m-p.com

CircuPool Indigo3-M By employing vacuum ultraviolet bulbs, this model creates O3 in a dependable fashion that can help clean the water in medium-sized residential pools. The system is covered by a three-year warranty, as well, so you should be covered if anything goes wrong. For a UV system, however, it is a bit expensive. circupool.com

Editor's Notes

September 02, 2019:

The biggest point of division between two camps of ozone generators separates UV-based systems from corona discharge systems. The former is generally regarded to be better for use in small pools due to the simplicity of its installation and maintenance, and its low electromagnetic output. The latter is generally better for larger home pools, and for industrial applications like commercial or community pools, as these tend to put out a higher concentration of O3 compared to UV.

In assembling this list, we wanted to keep those facts in mind, and understanding that UV can sometimes struggle to produce the results a lot of pool owners are after, you'll find that the vast majority of our ranking contains corona systems. It's only in our special honors section that you'll find effective UV generators by a pair of companies, Ozone Joes and CircuPool. They're good models for what they do, but that leads into another point.

Beyond the matter of O3 source, the most pressing issue is usually pool size, as the capacity and flow rate of a given generator will determine whether it's right for your pool. This is an instance where it's always safe to err on the side of a more powerful generator (most often an arc system), as these produce amounts of ozone so far below potentially hazardous levels that to have a little extra O3 in the water won't do anything worse than create a slightly sweet or — in extreme cases — antiseptic aroma. That said, try to shoot for a model that's as close to your pool's water capacity as possible.

A Brief History of Pools

Spending leisure time floating around in a pool really hit its stride in Britain in the 19th century C.E., however.

If there's one thing our species has always been keenly aware of, it's that diving into a pool of clear, cool water is incredibly refreshing.

Of course, when our ancestors did it, they had to jump in lakes and rivers, and there was the omnipresent fear of death by crocodile (this is still true in Florida and Australia). That's why it quickly became clear that having a man-made pool would offer some considerable advantages over swimming in nature.

The first known pool was built in modern-day Pakistan in the 3rd century B.C.E. It was a large tank, measuring about twelve meters long by seven meters wide, with stairs around the outside. The bottom was made of water-tight clay bricks, plaster, and tar, and the whole thing was likely used for religious ceremonies rather than splashing around in fur bikinis.

The Greeks and Romans enjoyed public pools as well. These were used for hygiene as well as socializing, and of course, training for naval combat.

Spending leisure time floating around in a pool really hit its stride in Britain in the 19th century C.E., however. That's when competitive swimming started to become popular, and several swimming societies were formed as a result. Of course, these races needed to be held somewhere, and indoor pools began cropping up in the London area.

However, many of these pools were fairly dirty, as there wasn't a suitable method for filtering out microbes at that time. The only method for cleaning the pool was to completely drain and refill it, and that was only done when it became disgustingly clear that a change was necessary.

Starting in 1910 at Brown University, attempts were made to sterilize the water with chlorine and other chemicals. In 1975, pools in the U.S. began to be treated with ozone, and UV radiation was utilized to eradicate algae and bacteria.

Today, pools are increasingly common, with an estimated 10 million households in America having a pool on the premises. Keeping all those pools sanitary takes a lot of work, which is why most owners have automated cleaners, or use cleaning services.

Then again, there's nothing quite as fun as watching your body turn green when you jump into your pool and then pretending you're the Incredible Hulk.

Why You Need a Pool Ozone Generator

When you think about pool chemicals, chances are your mind goes right to chlorine. However, many pools are moving away from chlorine in favor of other sanitizing agents, like ozone.

Ozone is an unsteady allotrope of oxygen. We flunked chemistry, so we don't know exactly what that means, but the upshot is that this unstable molecular structure causes it to latch onto anything it comes in contact with, and most bacteria dies almost instantly when upon becoming oxidized.

It sounds dangerous — and it is, for microbes — but it quickly reverts back to harmless oxygen once it hits the water.

If your generator doesn't have a high output, expect to have to add some other sanitizers.

Ozone doesn't just kill bacteria, either. It also wipes out viruses, mold, fungi, and bodily oils, leaving your water almost completely sanitized. Chlorine does this as well, but ozone works 3,000 times faster, and it requires lower concentrations to be effective. Using fewer chemicals can save you money over time, without having to compromise on the safety of your water.

It's also less likely to irritate the eyes or skin, and although it does have an odor similar to that of chlorine, it's not as potent.

Unlike chlorine, ozone doesn't affect the pH balance of your water, which is delicate and difficult to maintain, nor will it eat away at your pool's lining. This makes it lower maintenance than many other cleaning options.

It should be noted that, even if you install an ozone generator, there's a chance that you'll still need to add chlorine, bromine, or some other form of cleansing agent, as it takes ozone longer to penetrate a large pool. If your generator doesn't have a high output, expect to have to add some other sanitizers.

Installing an ozone generator doesn't mean that maintaining your pool will be entirely hands-off, but it should reduce the amount of time you have to spend working on it — which means you can spend more time lounging around it.

Tips for Keeping the Perfect Pool

Having a pool is a wonderful luxury, but unless you want to have your very own backyard swamp, they require a lot of work. To keep your water clean and clear, there are a few things you should keep in mind — but luckily, if you have an ozone generator, you're already ahead of the curve.

To keep your water clean and clear, there are a few things you should keep in mind — but luckily, if you have an ozone generator, you're already ahead of the curve.

Make sure it always has the proper water level. If it gets too low, it can damage the pump, while if it gets too high, that can cause the skimmer door to work improperly. Try to make sure that it's level with the skimmer.

Speaking of which, keep that skimmer basket clean. It's what keeps visible debris out of the water, but if it gets too full, all that junk will eventually float right back out. Clean it out at least once a week, and check the hair and lint pot while you're at it.

Take a brush to the water a couple of times a month. This can prevent algae build-up and ensure that your generator doesn't have to work too hard.

No matter how clean you keep the water, however, it's a good idea to drain and refill the whole thing every five years or so. All those cleaning chemicals can add up over time, which actually impedes the ability of new cleaners to work effectively. Starting fresh is a good way to keep everything running smoothly.

If you carve out an hour or two a week, you should be able to enjoy an immaculate pool every day of the year. Then again, if it gets too clean, those pesky neighbor kids might want to come over and use it all the time.

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Daniel Imperiale
Last updated on September 05, 2019 by Daniel Imperiale

Daniel Imperiale holds a bachelor’s degree in writing, and proudly fled his graduate program in poetry to pursue a quiet life at a remote Alaskan fishery. After returning to the contiguous states, he took up a position as an editor and photographer of the prestigious geek culture magazine “Unwinnable” before turning his attention to the field of health and wellness. In recent years, he has worked extensively in film and music production, making him something of a know-it-all when it comes to camera equipment, musical instruments, recording devices, and other audio-visual hardware. Daniel’s recent obsessions include horology (making him a pro when it comes to all things timekeeping) and Uranium mining and enrichment (which hasn’t proven useful just yet).


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