Land-based salmon and smolt RAS
Quick answer
Land-based salmon RAS ranges from smolt and post-smolt units that supply sea farms to full grow-out to harvest size. Key choices are salinity (fresh, low-salinity or full seawater), temperature control, scale and a reliable egg supply.
Smolt and post-smolt RAS
Growing smolt larger on land shortens the time in sea cages and can reduce exposure to sea lice. Many salmon producers now operate smolt RAS alongside sea farms.
Full grow-out on land
Full grow-out to 4–5 kg is capital-intensive and technically demanding. It suits projects with strong local market prices, reliable power and experienced teams.
Salinity choices
Some projects grow salmon at low salinity to reduce salt use and discharge issues, others use full seawater. Each choice affects fish health, growth, water treatment and site requirements, so ask suppliers for their experience at your chosen salinity.
Questions for salmon RAS suppliers
- Reference farms at similar scale and salinity
- Expected growth, survival and feed conversion
- Off-flavour and purging solution before harvest
- Early maturation control
- Redundancy and biosecurity design
Frequently asked questions
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