Why Ozone Generators Still Need Chemicals (And What to Pair Them With Instead)

If you've ever bought an electronic oxidiser for your spa or pool and still ended up reaching for the chemical bucket, you're not alone. These devices are genuinely impressive pieces of technology — but they're widely misunderstood, and the "chemical-free" marketing around them sets unrealistic expectations.

Here's an honest breakdown of how ozone generators actually work, why they fall short on their own, and why pairing one with a copper-silver ioniser is the most effective pool sanitation setup available today.

How Ozone Generators Work

Most electronic oxidisers use a process called Corona Discharge. Inside the unit, a high-voltage electrical arc — essentially miniature lightning — splits normal oxygen molecules (O₂) from the air and reforms them as ozone (O₃).

That ozone gas is then injected directly into your pool's plumbing via a suction valve. Once in the water, ozone is extraordinarily effective: it destroys organic waste like sweat, sunscreen, and oils roughly 3,000 times faster than chlorine. And once it's done its job, it breaks back down into pure oxygen — leaving no chemical residue behind.

On paper, it sounds perfect.

The Problem: Ozone Has No Residual

Here's the catch that the marketing rarely mentions: ozone is highly unstable. It only survives for a few minutes in water, and it only treats the water physically passing through the pipe at that exact moment.

By the time that water exits the jets and circulates back into the main body of your pool or spa, the ozone is completely gone. Any bacteria, algae, or organic matter floating in the far corner — water that hasn't yet been drawn through the filter — is completely untouched.

Over time, that untreated water accumulates contaminants. The result is cloudy water, and the inevitable addition of chemical shock to bring things back under control.

This is why ozone generators, despite their power, cannot function as a standalone sanitation system.

What's Actually Missing: A Residual Sanitiser

To keep pool water genuinely clean, you need two things working together:

  • An oxidiser — to break down dead organic matter (sweat, oils, sunscreen, pollen)
  • A sanitiser with residual — to actively hunt and kill living organisms (bacteria, algae, viruses) throughout the entire body of water, continuously

Ozone handles the first job brilliantly. It cannot do the second.

Traditional chlorine does both — but at a significant chemical cost to water quality, skin, and equipment.

The Tag-Team Solution: Ionisation + Ozone

This is where copper-silver ionisation changes the equation entirely.

A Claritech ioniser works by passing a low-voltage electrical current through copper and silver electrodes in your plumbing. This releases copper and silver ions into the water — ions that remain active throughout the entire pool, continuously eliminating bacteria, algae, and viruses in every corner, around the clock.

Pair that with an ozone generator, and the two systems cover each other's weaknesses perfectly:

  • Claritech Ioniser: Kills bacteria & algae throughout the entire pool ✅ | Breaks down organics ❌ | Residual in water ✅ | Automated ✅ | Virtually no chemical dosing required ✅
  • Ozone Generator: Kills bacteria & algae only in-pipe ❌ | Breaks down organics instantly ✅ | No residual in water ❌ | Automated ✅ | Requires chemicals on its own ❌

Together, they eliminate the need for manual chemical dosing — no chlorine, no MPS, no enzyme treatments. The ioniser handles sanitisation across the full body of water; the ozone generator handles automated oxidation as water passes through the system.

The result is a virtually chemical-free pool that maintains itself.

Is This Setup Right for You?

If you already own an ozone generator and have been frustrated by still needing chemicals, adding a Claritech ioniser completes the system.

If you're starting fresh and want the most premium, low-maintenance pool setup available, installing both from the outset is the approach we'd recommend.

A Note on "Chemical-Free" Claims

We're deliberate about this language. No pool system can guarantee zero chemical contact under all conditions — water chemistry, bather load, and environmental factors all vary. What the Claritech + ozone combination genuinely delivers is a dramatic reduction in chemical usage — typically up to 90% less than a conventional chlorine pool — with water quality that most customers describe as noticeably softer, clearer, and gentler on skin and eyes.

That's a claim we're confident standing behind.

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