All feed formulas developed by Aller Aqua at the Aller Aqua Research Centre follow these requirements to ensure proper growth and health:

• Protein Needs:

Juveniles: 50–55% crude protein

Grow-out: 45–50% crude protein

• Fat and Energy Needs:

Fat: 10–18%

Digestible energy: ~20–22 MJ/kg
Fat is essential in colder temperatures to meet energy requirements and maintain growth.

• Essential Nutrients:

Amino Acids: Lysine, methionine, taurine

Vitamins: A, D3, E, C, and B-complex

Minerals: Phosphorus, calcium, zinc, selenium, magnesium

Omega-3s: High requirement for DHA and EPA to support metabolism and flesh quality

• Feed Composition:
  Feeds typically include fishmeal and fish oil, though increasingly supplemented with plant-based proteins and sustainable oils like algal DHA or rapeseed oil.

The range of solutions developed by Aller Aqua is suitable for each stage of the fish lifecycle as well as the following farming methods:

• Culture Systems:

Land-based tank systems are most common, including flow-through and recirculating aquaculture systems (RAS)

Some experimental net pens have been used in fjords or sheltered coastal areas

• Environmental Conditions:

Temperature: Optimal between 8–12°C

Salinity: Full marine salinity (~30–35 ppt)

Oxygen: Requires high levels (>6 mg/L)

• Life Cycle & Rearing:

Halibut hatcheries are complex; the fish has a long larval stage and requires careful weaning from live feed to dry feed

Males mature earlier and stay smaller; females grow larger and are preferred for production

• Stocking Density:
  Typically low to moderate (~5–20 kg/m²) due to their large size and territorial behavior

• Feeding Practices:

Fish are fed sinking pellets, tailored to their benthic nature

Automated or hand feeding used, depending on system size

• Growth & Harvest:

Slow-growing: market size (~3–5 kg) reached in 3–4 years

Some fish are grown up to 10–15 kg for premium fillets

A carefully selected composition of raw materials and verified feed formulas ensure that the fish is rich in minerals and vitamins, and at the same time that the texture of meat is of the highest quality. We make sure that fish grown using solutions provided by Aller Aqua offer the following benefits: