Loading... Please wait...

Better Water Blog

Ozone versus UV Sterilization in Hot Tubs and Pools

Posted by

In order to compare Ozone vs. UV in hot tubs and pools, we first need to clarify (pun intended) what Ozone and UV mean.

OZONE.  Simply put ozone is O3, or activated oxygen.  There are two basic ways to generate ozone for pool and spa use:  Ultra Violet Rays (think sunshine) and Corona Discharge (think lightning bolt).  Imagine up in the Upper Atmosphere, ozone is naturally created when the UV rays from the sun or the "energy fields of light" split the passing-by oxygen molecules into two single atoms.  Not happy in this state, they quickly reform as oxygen (O2) OR a single atom attaches to an oxygen molecule, making an ozone molecule (O3).

UV OZONE.  Again, ozone is made either with UV or CD generation.  UV ozone is mild and virtually ineffective in most cases (with the exception being DELZONE UV generators which are no longer available).  Producing low levels of ozone, these UV ozone generators don't live very long (9,000 hours).

UV-C STERILIZATION.  UV ozone and UV-C both come from light bulbs, but one has a shorter wavelength.  One creates UV ozone, and one creates UV-C sterilization.  Both are "UV", both are light bulb technology, but result is quite different.

Let us eliminate the weakest method:  UV OZONE.  UV ozone is antiquated technology that uses more electricity, dies faster, and doesn't save you as much in chemicals as either CD Ozone or UV-C sterilization.  So, bye bye UV Ozone!

That leaves us with two awesome methods to sanitize your pool or hot tub:  CD Ozone and UV-C sterilization.  CD Ozone outperforms UV-C in one critical way:  ozone cleans up its mess; UV-C does not.

When UV-C is done doing its job (changing the DNA in organisms so they can't reproduce), it leaves behind all the carcasses and debris.  It is the job of chemicals or enzymes and the filter to remove the mess.  Ozone, on the other hand, kills EVERYTHING in the water 99.9999999%, then sweeps it all up in a process known as micro-flocculation.  This means to clump.  So, first ozone destroys, oxidizes, and blows up the bacteria, viruses and other organics in pool or spa water.  Then it clumps it all back together until the chains are long enough to get filtered out.

UV-C sterilizer's end result:  water that is safe to swim in, but gets cloudy and dirty fast.

Ozone's end result:  water that not only safe to swim in, it is CRYSTAL CLEAR.

WHICH ONE WOULD YOU PICK?  Ozone, of course!  Check out our spa ozone and pool ozone sections for more information..

Ever hear, "the sum is greater than its parts"?  Well, this is the case with ozone and UV-C sterilization!  Turns out, when you inject ozone into a UV-C sterilizer, they create a reaction leading to an even more powerful sanitizer than either ozone or UV-C:  ADVANCED OXIDATION PROCESS (or AOP).  Check out our AOP pool systems and our AOP hot tub and swim spa systems.

We hope this blog post helps you decide which system is best for you.

Smelly Hot Tub Water

"Pass the cheese" is not something you want to hear, or smell, in a hot tub.  If your hot tub is cloudy and smelly, there's a good chance your spa ozone generator expired.Spas with ozone use fewer chemicals.  But when ozone dies around the three year mark, water chemistry goes haywire.  pH becomes a nightmare [...]

Read More »

How Can I Tell if My Spa Ozone Generator is Working?

Four main indicators help determine if your spa ozone generator is working:1. WATER CLARITY.  Spa water should be crystal clear and odorless.  Anything less than perfectly clear and balanced water is an indicator that one or more of the following is true: Spa Ozonator has expired and needs replacingCheck valve failed and ozone [...]

Read More »

Spa Water Chemistry is Easier With an Ozonator

Hot Tub and spa owners have a hard time balancing water chemistry when there is simply too much in the water, and pH begins to fluctuate.  Contamination includes humans by-products, chemicals, chemical by-products, calcium, iron and manganese, to name a few.When spa water gets out of whack, what do most spa owners do?  Dump it.  [...]

Read More »

Recipe for Perfect Hot Tub Water

In this article, we will provide you what we believe is the recipe for perfect hot tub water!  By "perfect" we mean crystal-clear, hassle-free and healthy.   LoveYourHotTub.com gives you ultimate ownership of your spa's water quality.  You are the boss of your hot tub water, so be aware:  more is not better and balance is key.Bromine or Chlorine?  [...]

Read More »

"Yellow Goo" in Your Spa Ozone Tubing? What is it, and What Can You Do About It?

"Yellow Goo" in your Spa Ozone Tubing is a collection of Nitric Acid.  Nitric Acid is formed when Nitrogen in the air mixes with moisture in the air.Yellow Goo is not new!  But the one thing that did change for the better of the environment is the fact that a few years ago the tubing [...]

Read More »

On The Job Site With Jen #3: How to Polish Up An Old Hot Tub or Spa

It’s a sad sight to see an old hot tub or spa look so bad that nobody wants to open the lid and get in.  With every passing day, the hot tub is less and less likely to be used again.When a local customer asked for help “flipping her hot tub,” I happily took on the challenge!  [...]

Read More »

Autistic People Benefit from Ozonated Pool and Spa Water

My customer, Bob, told me their pool builder recommended a DEL Ozone system for his 38-year old Autistic son, Ryon, who LOVES to swim and swim and swim! Swimming brings calmness and peace to Ryon, as well as his family.  Music and walking rank second and third to swimming in Ryon's ozonated pool.A DEL [...]

Read More »

Ozone is a Drought-Tolerant Solution for Pools and Hot Tubs

Ozone has many benefits for pool and hot tub owners and users.  But one of the benefits people are not yet aware of is that ozone is a friend to those living in areas that are dealing with drought situations like we are in California.The primary reason ozone is helpful when it comes to saving [...]

Read More »

On The Job Site With Jen #2: How to Replace a Spa Ozone Generator Featuring DEL Ozone’s Spa Eclipse NEXT GENERATION

View and/or download these instructions WITH PICTURES at the end of this article.Time to replace your spa's Ozone Generator?  Most of the time, replacing a Spa Ozone Generator is easy.  Here we show you an installation we did on a California Cooperage Coleman Spa. STEP 1:  Get a buddy if you can.  It really helps to [...]

Read More »