• Optimised nutrient levels to support fast growing post smolt
  • Improved FCR
  • Better nutrient utilisation and reduced nitrogen discharge
  • More stable faeces, easier to remove resulting in better water quality

More fish, less waste, better water quality

Altra RCX contains optimised level of digestible protein and digestible energy adjusted to the needs for fast growing post smolt in RAS.

Results show that Altra RCX enables the growth potential of the fish with improved FCR, better nutrient utilisation and improved faecal stability.


Altra RCX is currently available in Norway.

Nutrient balance

For smooth and efficient RAS operations, it is important to reduce the load on the system. Altra RCX has right balance of nutrient to acheive better fish growth with less feed input and less nutrient discharge. This is acheived by fine tuning the protein to energy ratio in the feed. 

Reduced waste

Having sufficient digestible energy, protein from the feed is used for growth instead of energy, resulting in lower nitrogen discharge into the system. 

Faeces binders

Altra RCX contains faeces binders optimised to fish size that helps faeces be more stable with larger particles. This enables efficient and easy removal of organic material from the water by the mechanical filters, reducing the level of nitrogen and phosphorus in the water.

Suitable for

  • Salmonid lifecycle
  • Salmonid lifecycle
  • Salmonid lifecycle
  • Transfer
  • Salmonid lifecycle
  • Salmonid lifecycle
  • Salmonid lifecycle

Our services

AquaSim Christoffer


Our powerful AquaSim suite offers advanced forecasting and analysis for fish and shrimp farmers to optimise farm performance and provide tailored advice. 

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Near-infrared spectroscopy (NIRS) is an accurate and rapid analysis method that is well suited for quantitative determination of nutrients in feed ingredients and feed.

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Tracking and tracing illustration

How we work with transparency and trust

For us in Skretting, it's essential to increase the transparency and traceability of food production along the supply chain. Our feed to food quality and safety system ensures that our customers and end consumers can have full confidence with regard to our feeds. Combining the latest technology and science with the dedication of our staff to produce the highest quality feed, we do our utmost to ensure that our business operations adhere to our own strict environmental guidelines. 

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RAS monitors


Skretting is the market leader for diets specifically designed for Recirculating Aquaculture Systems (RAS). RAS are land-based aquaculture facilities that reuse water by cycling it through a filtration system so it can be used again.

About RAS