How to Compare Turnkey Aquaculture Proposals Independently

1. Design basis and production assumptions

If bidders sized against different inputs, their prices are not comparable. Restate every offer against your own numbers.

• Species, annual tonnes and harvest size

  The basis for cost per annual tonne and for every treatment component.

• Peak standing biomass and maximum daily feed load

  Drives biofilter, oxygen, CO₂ stripping and pumping — check it against the RAS sizing calculator.

• Water source, temperature and makeup water rate

  Sets heating or cooling load and the treatment train; a 0.5% and a 5% daily makeup design are different technologies.

• Stocking density, growth curve and survival used

  Optimistic biological assumptions shrink the plant on paper. Ask which figures were assumed and where they come from.

• Number of independent systems

  Fewer, larger loops are cheaper but concentrate biosecurity and failure risk.

2. Scope: what is actually included

Scope differences explain most large price gaps between turnkey offers.

• Process equipment (tanks, filtration, biofilter, oxygen, disinfection)

  The core every bidder includes — check type and capacity, not only the list.

• Building, insulation, floors and drainage

  Often the single largest item, and often excluded from 'turnkey' equipment offers.

• Electrical supply, transformer and standby generator

  Grid connection and backup power are frequently left to the buyer.

• Hatchery, nursery, purge, processing and cold storage

  Some proposals cover only grow-out; the rest of the production chain is a separate cost.

• Engineering, permits and environmental documents

  Design for local codes and permit support may be priced separately or not at all.

• Stated exclusions list

  The most informative page of any proposal. A bidder that will not list exclusions cannot be compared.

3. Lifecycle cost, not signing price

Compare what each proposal costs over the period you plan to operate, using your own tariffs.

• Installed electrical load and expected kWh per kg produced

  Energy is a major running cost in RAS; ask for the calculation, then apply your local tariff.

• Oxygen, water, heating/cooling and consumables per tonne

  Liquid oxygen supply versus on-site generation changes both CAPEX and OPEX.

• Staffing level the design assumes

  Automation lowers labour but raises service dependence.

• Replacement cycles (pumps, UV lamps, sensors, media, membranes)

  Turns a one-off price into a realistic 10-year cost; compare in the TCO tool.

• Currency, price validity and escalation clauses

  A cheaper offer with a short validity and open escalation is not cheaper.

4. Uptime, redundancy and failure handling

In intensive systems a pump, oxygen or power failure becomes a mortality event within hours.

• Redundant pumps, blowers and oxygen supply

  N+1 on critical items costs more and protects the stock.

• Automatic transfer to standby power and its response time

  Ask what happens in the first ten minutes of a grid outage.

• Alarm, monitoring and remote access

  Which parameters are monitored, who is alerted, and whether the software is a subscription.

• Emergency oxygen and stand-alone backup

  Often an optional extra; it should be a scope line.

5. Installation, commissioning and performance

Most disputes arise between delivery and stable production.

• Supply-only, supervised installation or full installation

  Three very different scopes, often hidden behind the word 'turnkey'.

• Commissioning steps and acceptance test

  Define the measurable conditions (flows, water quality, alarms) that mark handover.

• Biofilter start-up and first stocking support

  Who is on site during the first production cycle, and for how many days.

• Performance warranties and their conditions

  Any guarantee depends on feed, fingerlings, operators and water staying within limits — compare the conditions, not the headline.

• Operator training and manuals

  The plant only performs if your team can run it.

6. Warranty, after-sales and certification

The relationship continues for the life of the plant.

• Warranty period, start date and exclusions

  From delivery, installation or acceptance — the difference can be a year.

• Spare parts package and local stock

  Critical spares on site versus shipped on failure from another continent.

• Response time and in-country service capability

  Ask for a named service route and response commitment in writing.

• Equipment certification and documentation

  Electrical, pressure and food-safety compliance for your country, plus as-built drawings.

7. Commercial terms and financing

How the money flows changes the risk you carry.

• Incoterms, freight, duties and local taxes

  Ex-works and delivered-on-site prices cannot sit in the same column.

• Payment milestones and security

  Advance payments, bank guarantees and retention protect different parties.

• Financing offered by the bidder or its partners

  Supplier credit can be useful; compare its rate and tenor with an independent loan rather than accepting it as part of the price.

• Operator or offtake arrangements

  If a bidder also offers to operate the farm or buy the fish, read who carries production and market risk.

Common comparison mistakes

• Comparing a full-building offer with an equipment-only offer on headline price.
• Accepting a design basis written by the bidder instead of your own production target.
• Treating energy, oxygen and replacement parts as someone else's problem after handover.
• Reading a performance guarantee without its conditions.
• Choosing the technology before testing sale price, financing and site against the plan.
• Requesting proposals from many bidders without one shared written scope.

Compare turnkey proposals through one reviewed brief

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