You’ve probably seen luxury spas boasting about their “saltwater systems” and thought: “That sounds lovely, can I do the same with my inflatable spa?” The short answer? Yes, it’s possible—but it’s usually not a good idea.

Before you start pouring salt into your hot tub like you’re seasoning chips, let’s break down why most inflatable spas just aren’t built for it, and what safer options you might want to try instead.

The Short Answer: Is it possible?

Yes—you can run saltwater in an inflatable spa. It works by converting dissolved salt into chlorine, which keeps your water clean without the need for constant chlorine tablets.

But here’s the catch: salt and inflatable hot tubs don’t always get along. While it might sound like a softer, more natural option, it can cause long-term problems for your spa’s components.

What is a saltwater hot tub system?

A saltwater system uses a process called electrolysis to convert salt into chlorine. The water feels smoother on your skin, it doesn’t smell as strongly, and it’s often gentler on your eyes.

So far, so tempting, right?

How does it differ from a traditional chlorine system?

With a traditional system, you’re the one doing the work—adding chlorine or bromine regularly. A saltwater system does the job for you, slowly releasing chlorine into the water.

It feels like an upgrade, but in inflatable spas, the downsides often outweigh the benefits.

The Long Answer: Why it's not recommended for most inflatable hot tubs

The Risk of Corrosion and Damage

Damage to the pump and heater

Salt is highly corrosive. Over time, it can eat away at metal components like the heater and pump, leaving you with expensive repairs.

The effects on internal components

It’s not just the obvious parts. Saltwater can also damage electrical elements and filtration systems. The result? Shorter lifespan and higher running costs.

Compatibility Issues with the Hot Tub's Materials

Why standard inflatable hot tubs aren't built for saltwater

Most inflatable hot tubs are made from PVC or vinyl, which are no match for constant salt exposure. Unlike fibreglass or acrylic shells, they’re not designed to cope.

The impact on PVC and other plastics

Salt can weaken seams, cause fading or discolouration, and even make the material brittle over time. Not exactly what you want from your family spa.

Warranty and Manufacturer's Recommendations

What do inflatable hot tub manufacturers say?

Check your manual, and you’ll usually find a clear warning: “No saltwater.” Brands know their products aren’t built for it, and they don’t hide it.

The potential to void your warranty

If you ignore the advice and something goes wrong, chances are the warranty won’t cover the repairs. You could be left footing the bill for preventable damage.

What about saltwater hot tubs with a chlorine generator?

Understanding Saltwater Chlorine Generators

How a chlorine generator works

These clever devices use salt to make chlorine automatically, meaning fewer chemical top-ups from you.

Why they are used in some spas and pools

They’re popular in larger spas and swimming pools because they offer softer water, consistent sanitisation, and less of that “chlorine smell.”

The limitations for inflatable hot tubs

The need for a specific type of hot tub

Not every inflatable spa can handle a chlorine generator. Only certain models are designed for it, and they’re usually more expensive.

The cost and complexity of adding a saltwater system

Even if you could fit one, the system itself isn’t cheap. Add in maintenance, and you may find it’s far more effort (and money) than simply sticking to traditional sanitisers.

Other sanitising options for your hot tub

Bromine: A gentler alternative

If chlorine irritates your skin, bromine is a softer choice. It’s less harsh, works well in warm water, and still keeps the spa safe and clean.

Non-Chlorine Shock treatments

These oxygen-based treatments refresh your water without the strong smell or sting of chlorine. A handy option if you’re sensitive to chemicals.

The importance of proper water maintenance

No matter which sanitiser you choose, nothing beats regular upkeep. Test your water, balance the pH, and clean your spa on schedule. It’s the real secret to a safe and enjoyable soak.

Conclusion & Takeaways

So, can you use saltwater in an inflatable spa? Technically, yes—but it’s usually more trouble than it’s worth. Saltwater can corrode parts, weaken materials, and void your warranty.

Instead, consider safer alternatives like bromine or non-chlorine treatments. Stick to regular maintenance, and you’ll enjoy crystal-clear water without risking the health of your spa.

Because at the end of the day, inflatable hot tubs are about relaxing—not worrying if your water treatment plan is slowly destroying your spa.

Have you checked out our other posts?

Is 10 Years Old Too Young For A Hot Tub?

Can I Put Epsom Salt In My Inflatable Hot Tub?

Can You Put Pool Shock In An Inflatable Hot Tub?

Is Bromine Better Than Chlorine For Hot Tubs?

Do I Need Chlorine In An Inflatable Hot Tub?