Ozone Vs. UV vs. Salt — the battle of the hot tub sanitizers and treatments

What is an Ozone Sanitizer?

A hot tub ozone generator or ozonator is another system that can sanitize your hot tub. Essentially this type of system injects ozone gas into the plumbing of the spa so that it can mix with your hot tub water to help break down residue from lotion, sunscreen, soaps, body oils, perfume, makeup and other contaminants. It then eliminates these impurities from the water. This type of system can be built into a hot tub’s technology, depending on the brand and model. A separate after-market system can be also added to your hot tub if compatible.

There are several “pros” of this type of sanitizer. Ozone generators are touted as being a simple and chemical-free way to keep your hot tub water clean and fresh. This type of system also claims to require less chemicals to keep your spa water sanitized and the water may not need to be changed as often. Some hot tub users even report the water feels smoother on their skin when using an ozone system.

While these are great benefits, it is important to recognize a few of the “cons” of this type of sanitizer as well. Ozone is a powerful combatant to the bacteria and other contaminants in the hot tub water—a pro. However, the result of this is that ozone sanitizers can damage your hot tub pillows and the cover’s interior if it is made from vinyl. It’s important to make sure your hot tub model will be compatible with an ozonator. To do so, check your owner’s manual or ask your local dealer before making this purchase. You will also want to keep in mind that this option will also require chlorine, bromine, or non-chlorine shock treatment as well.

What is a Saltwater Sanitizer?

Most people have heard of a saltwater swimming pool or a saltwater sanitizer system for a hot tub. Many users tout saltwater for being void of a heavy chlorine odor. Others say their skin feels softer after a soak in a saltwater hot tub. However, there is more to this type of system than meets the eye.

First of all, saltwater systems are not at all free of chlorine or chemicals. Quite simply, a saltwater system produces its own chlorine. It does so via a salt chlorine generator that converts sodium chloride through a process called electrolysis.

So while you may not have to manually add it as often, chlorine is still in use. Furthermore, chemicals will still need to be added to maintain the water’s balance. Another problem here is that hot tubs that use saltwater systems tend to not be as effective as traditional hot tubs when high calcium levels are present in the water. This may require a calcium remover to balance the water.

Though some users may be happy about their smooth, soft skin, this type of system is not so easy on your hot tub. You should know that salt deposits can build up or cause residue on the hot tub itself and its internal components. Saltwater systems can therefore significantly shorten the lifespan of your spa. Salt can be quite corrosive and damaging to the hot tub’s heaters, pump seals, stainless steel fittings, bearings in the jets and other components. While some people love saltwater systems, they can actually be very expensive and problematic over time.

Clean and clear water is an essential part of your hot tub experience and you don’t want water care to be an ongoing hassle. It’s best to speak with a professional hot tub dealer that can walk you through the best sanitizer or treatment option for the hot tub brand and model you are interested in.

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Medical disclaimer: This information is not intended to prescribe a particular diagnosis or course of action. We are not medical professionals. Please contact your GP or other medical professional for advice if you have any concerns about your current health or well-being.