Chlorine-Free Water Treatment.Smart Disinfection.Powered by Nanobubbles.

Why go chlorine-free?

Chlorine works. It is cheap, well understood, and it has kept public pools safe for a century. The problem is not chlorine as a disinfectant — it is what chlorine turns into once it meets what swimmers bring into the water.

Free chlorine reacts with sweat, urine, skin cells, cosmetics and sunscreen, and forms chloramines. Chloramines are what people are actually complaining about when they blame “too much chlorine”:

• The sharp chlorine smell in an indoor pool hall, which signals high combined chlorine rather than high free chlorine.
• Stinging eyes, tight skin, and flare-ups for swimmers with eczema or sensitive skin.
• Airway irritation for instructors, competitive swimmers and staff who spend their working day at the water’s edge.
• Corrosion of handrails, ladders, fixtures and ventilation ductwork — plus a chemical purchasing line that never leaves the budget.

Pool disinfection without chlorine removes the source instead of ventilating the symptom. If you are weighing up the alternatives — active oxygen, salt, UV, ozone or nanobubbles — start with the full buyer’s guide: Learn about chlorine-free pools. It is written to be fair to every method, including the ones we do not sell.

An honest caveat up front: a public pool in Norway normally still has to keep a measurable disinfectant residual in the basin. What a public facility realistically achieves is a large reduction in chlorine, not zero. Private pools, hotel pools and spas have far more freedom.

How nanobubble disinfection works

Nanobubbles are gas-filled bubbles smaller than roughly 200 nanometres — thousands of times smaller than a grain of salt. Unlike the bubbles you can see, they do not rise and burst. They carry a negative surface charge, stay suspended in the water for days, and present an enormous combined surface area to everything around them.

That surface area is the whole point. It lets a nanobubble system dissolve oxygen or ozone into water far more completely than coarse injection, where most of the gas escapes at the surface before it transfers anything at all. The collapse of individual bubbles then releases oxidation energy at microscopic scale, disrupting pathogens and breaking down the organic load that would otherwise become chloramines.

The underlying science — including how nanobubbles differ from microbubbles and ordinary bubbles, and what the negative surface charge does to biofilm — is set out on How nanobubbles work.

Our products

We build six nanobubble systems. The smallest, the NanoSWIM Compact Unit, handles up to 60 m³/h and installs plug and play where plant-room space is tight. The largest, NanoSWIM Industrial, is custom-configured for flows up to 2,000 m³/h. Between them sit a pool system, a higher-capacity commercial pool system, an ozone transfer unit for water distribution, and a trailer-mounted mobile unit for remote sites and fish transport.

Choosing between them is a question of flow rate and application rather than badge. The sizing logic, the build materials and the full specification of each system are on the product overview — See all products.

Applications

The same core technology does three quite different jobs.

• Swimming pools and aquatic facilities. Municipal pools, hotel and resort pools, swim schools, spas and private pools. Clearer water, no chlorine smell in the hall, and a smaller chemical bill: Nanobubbles for swimming pools.
• Municipal and industrial water treatment. Oxidation without added chemicals, higher dissolved oxygen, and less sludge and odour in process water.
• Live fish transport and aquaculture. Nanobubbles hold oxygen in the water column instead of letting it escape at the surface, which matters most during transport and at high stocking density.

Our sister company NanoMAR applies the same core technology as industrial nanobubble technology for marine and industrial customers.

Proven results

We would rather point at measured installations than adjectives. A resort pool cut its chlorine use by 85% after switching to nanobubble treatment, and an Atlantic salmon RAS facility recorded 28% higher survival through grow-out — a land-based installation, not a wellboat. Both numbers come from real sites, with the operating context described so you can judge whether it resembles yours.

NanoSwim AS is based at Blomsterdalen outside Bergen. Being a Norwegian supplier matters more than it sounds: the facilities we commission answer to the Norwegian bathing-facility regulations, and we can be on site rather than on a support ticket. The case studies and customer types are collected here: See our references.

Wellboats: oxygen in transport, disinfection between assignments

Besides the six pool and water-treatment systems, NanoSWIM has a marine line for wellboats, and it does two separate jobs. With fish on board, oxygen demand changes quickly through loading, transport and unloading, and fish welfare drops fast if dissolved oxygen becomes unstable. The ABAN-20 oxygenation module treats a sidestream from the vessel's recirculation loop with 20 passive, hydrodynamic nanobubble generators, using the vessel's own seawater pump and low-pressure oxygen supply. Its design basis is 1,000 m³/h and 100 kg O₂/h per module, and one module per well is recommended.

Once the fish are off, the empty wells, piping and equipment have to be disinfected before the next load. The ARVAND-O3 skid does that in closed loop with ozone nanobubbles, ORP / TRO monitoring, off-gas destruction and deozonation before discharge. Both systems are offered through a pilot programme. The target for the disinfection pilot is to cut disinfection turnaround by at least 50% — a target, not a measured result. The full picture is on wellboat oxygenation and disinfection.