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The Truth About “Self-Cleaning” Hot Tubs

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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. 💧

How do I order?

To purchase online:
1. Proceed to checkout and complete your order.
2. We’ll call you within 48 hours to schedule everything.
3. If you need installation, we’ll discuss options and arrange a site survey over the phone.
4. Your item(s) will be delivered hassle-free on your chosen date.
5. If you’ve opted for installation, this will be completed on the day of delivery.
Alternatively you can come visit one of ourshowrooms , call us or request a call back and we can arrange everything there and then including finance if desired.

Delivery

All of our acrylic hot tubs can be delivered anywhere within the UK mainland. To ensure the best experience, we schedule a convenient delivery date for you. Our team will contact you within 48 hours of placing your order to confirm the details.

Installation

If you’d like to have your hot tub installed, our expert engineers are available to get everything set up for you. Ahead of your installation date, we’ll arrange a site survey (usually completed by phone or video call) to ensure we can access your garden space and allow for a smooth installation.
Take a look at our customer installation reviews for examples of our recent work.
For some hot tubs, a Crane/Hiab may be required to move them into position depending on your access. This service comes at an additional charge and must be arranged with an external company. If you’re unsure where to start or would like a recommendation, our team will be happy to assist.