Salt Systems, UV, Ozone & NanoBubble™ Technology Explained
The hot tub industry is constantly evolving, with manufacturers introducing new technologies designed to make ownership easier than ever before.
From saltwater systems and UV sanitation to ozone generators and the latest NanoBubble™ technology, modern spas are becoming more advanced, more efficient and significantly lower maintenance than older generations.
But there’s one phrase we believe needs a little clarification:
“Self-cleaning hot tubs.”

At Heavenly Hot Tubs & Swim Spas, we believe in transparency and educating our customers properly — not simply relying on marketing buzzwords.
So let’s break down what these systems actually do.
Do “Self-Cleaning” Hot Tubs Really Exist?
In short: no.
While today’s premium water management systems can dramatically reduce maintenance and chemical usage, no hot tub can safely operate without ongoing water care.
Why?
Because hot tubs contain:
- Warm water
- Regular bathers
- Body oils
- Sweat
- Cosmetics
- Organic contaminants
All of these factors affect water quality and require proper sanitation and filtration to keep the water safe and enjoyable.
Salt Water Hot Tub Systems
Brands like Caldera Spas use systems such as the FreshWater® Salt System, which generates sanitiser automatically from salt added to the water.
Benefits of Salt Systems:
- Softer-feeling water
- Lower day-to-day maintenance
- Reduced chlorine smell
- More automated sanitiser production
But They Still Require:
- Water balancing
- Filter cleaning
- Cartridge replacement
- Periodic oxidising/shocking
- Water testing
Salt systems can absolutely make spa ownership easier — but they are not maintenance free.
Jacuzzi® CLEARRAY® & NanoBubble™ Technology
Jacuzzi has taken a different approach with systems like CLEARRAY® UV-C and the newer True Water™ NanoBubble™ technology.
These systems focus on reducing chemical demand through:
- UV-C sanitation
- Advanced filtration
- Ozone treatment
- NanoBubble oxidation technology
Benefits Include:
- Crystal clear water
- Lower chemical usage
- Softer water feel
- Improved oxidation
- Reduced odours
- Easier maintenance
NanoBubble™ technology is particularly exciting because microscopic oxygen-filled bubbles remain suspended in the water for extended periods, helping oxidise contaminants throughout the spa.
It’s genuinely one of the most innovative developments we’ve seen in modern water care.
However…
Even these advanced systems still require:
- Routine filter cleaning
- Water testing
- Sanitiser monitoring
- Proper water balance
- Periodic maintenance
No technology completely removes the need for responsible spa ownership.
The Difference Between “Low Maintenance” and “No Maintenance”
This is where many customers get confused.
Modern systems are:
✅ Lower maintenance
✅ Easier to manage
✅ More efficient
✅ More comfortable for users
But they are not:
❌ Chemical free
❌ Maintenance free
❌ Completely self-cleaning
There’s a big difference.
Why We Believe Education Matters

At Heavenly Hot Tubs & Swim Spas, we’d rather give customers honest, realistic advice than overpromise.
We believe the best ownership experience comes from:
- The right hot tub
- The right technology
- Proper setup
- Correct water care
- Ongoing support
When customers understand how their spa works, they enjoy:
✔ Better water quality
✔ Lower running costs
✔ Fewer issues
✔ Longer equipment life
✔ A much better overall experience
Final Thoughts
The latest hot tub technology is genuinely impressive, and systems like saltwater sanitation and NanoBubble™ oxidation are helping make ownership easier than ever before.
But the idea of a completely “self-cleaning” hot tub is still more marketing than reality.
The good news?
With the right advice and the right setup, maintaining a modern hot tub is far easier than most people think.
And that’s where proper guidance makes all the difference. 💧



