As global demand for responsibly farmed salmon continues to grow, modern hatcheries must balance productivity, sustainability, and fish welfare. SalMar Settefisk, located in Follafoss, Norway, is a prime example of how advanced ozone  generators for aquaculture, supports these goals at scale.

Part of SalMar ASA, one of the world’s largest and most advanced salmon producers, the facility produces approximately 10 million smolts per year. To maintain consistently high water quality while expanding its operations, SalMar selected Primozone® ozone generators as a core component of a new Recirculating Aquaculture System (RAS).

Why SalMar Chose Primozone® Ozone Water Treatment

When planning the expansion, SalMar required a solution that would deliver reliable disinfection, protect smolt health, and reduce energy consumption. Primozone® was selected to design and supply a complete, turnkey ozone water treatment system tailored to the hatchery’s RAS requirements.

The key project objectives were to:

• Maintain stable, high‑quality recirculating water
• Improve smolt health, welfare, and survival rates
• Optimise energy and oxygen efficiency
• Ensure simple, reliable day‑to‑day operation

The Primozone® Ozone Solution for RAS Hatcheries

Primozone delivered a high‑performance ozone system engineered for seamless integration into SalMar Settefisk’s RAS setup.

Core System Components

• GM18 Ozone Generator – High ozone output with low energy consumption
• Advanced System Controller – Automated, precise ozone dosing and monitoring
• Custom Ozone Dissolution System – Efficient ozone transfer with stable, controlled operation

Together, these components ensure accurate redox control, effective reduction of organic load, and reliable pathogen management — all essential for healthy smolt development.

Cost‑ and Energy‑Efficient Ozone Technology for Aquaculture

Primozone’s modular ozone generator design offers several advantages for land‑based aquaculture facilities, including:

• Energy‑efficient ozone production
• Optimised oxygen utilisation
• Built‑in system redundancy for operational security
• Compact footprint for space‑restricted RAS installations

As a result, hatcheries benefit from reduced operating costs without compromising disinfection performance or reliability.

Measurable Benefits for Water Quality, Smolt Health, and Productivity

Maintaining excellent water quality remains critical to producing robust smolts. Following installation, SalMar Settefisk experienced clear and immediate improvements:

• Improved water quality through reduced organic matter and pathogens
• Lower energy costs thanks to efficient ozone and oxygen use
• Higher productivity, with improved growth rates and reduced smolt mortality

Results at a Glance

• Improved Water Quality – Cleaner, safer recirculating water
• Energy Efficiency – Optimised ozone generation and oxygen usage
• Higher Productivity – Healthier smolts and lower losses

Why Ozone Is a Key Technology for Sustainable Aquaculture

This project demonstrates how ozone generators for aquaculture, enable fish farms to meet increasing sustainability and welfare expectations. By reducing chemical use, improving biosecurity, and lowering energy demand, ozone supports long‑term environmental and commercial performance in modern RAS facilities.

Conclusion: Primozone® Sets the Standard for Ozone in Aquaculture

The Primozone® ozone solution at SalMar Settefisk highlights how advanced ozone generators for aquaculture drive sustainable growth. By delivering reliable water quality, energy efficiency, and user‑friendly operation, Primozone helps hatcheries meet production targets while maintaining strict environmental standards.

This project sets a clear benchmark for the future of land‑based salmon farming.

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Speak to the Ozone Disinfection Specialists

If you are considering ozone water treatment, ozone generators for RAS, or aquaculture disinfection systems, our team can help design a solution for your facility.

Contact SOS for more information on Primozone® ozone technology.

Call: 0161 221 2231
Email: info@soshygiene.com.