How often should aquaculture nets be cleaned?

For salmon net pens, every 10–14 days is typical. In warmer waters with faster biofouling, cleaning may be needed weekly. Inspect nets regularly and adjust the interval based on fouling rate.

What is biofouling and why does it matter?

Biofouling is the accumulation of organisms (algae, mussels, hydroids) on net surfaces. It restricts water flow, reduces dissolved oxygen inside the pen, increases drag on mooring systems, and creates habitat for parasites.

What methods are used for net cleaning?

In-situ cleaning with high-pressure washers or rotating disc cleaners is most common. Nets can also be removed and cleaned on shore. Antifouling coatings reduce but do not eliminate the need for cleaning.

Should I inspect nets during cleaning?

Always. Net cleaning is the best opportunity to check for tears, predator damage, and structural wear. Document any damage found and schedule repairs before re-deployment.

ToolsConductScience tool

AquacultureFree in-browser calculator

Net Cleaning Schedule.

Schedule recurring net cleaning reminders for your aquaculture net pens. Export 6 months of reminders to your calendar.

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Validated2026-04-08

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Load example net cleaning scheduler data to see the full workflow

Cleaning Parameters

Last Net Cleaning

Interval (days)

Default: 14 days (salmon net pens)

Preview

6/23/2026next cleaning

Recurring every 14 days × 26 cleanings (~12 months)

Interval

14d

between cleanings

Occurrences

scheduled cleanings

Coverage

~12mo

total schedule span

When to use

Scheduling routine net pen cleaning for marine or freshwater cage farms
Planning dive team or cleaning vessel deployment
Documenting maintenance schedules for regulatory compliance
Coordinating cleaning across multiple net pen sites

Do not use for

As a substitute for visual net inspection — fouling rates vary with season and location
For emergency net repairs — damage discovered during inspection requires immediate action

Fouling rate varies by season

Summer months in temperate waters produce 3–5x faster fouling than winter. Shorten cleaning intervals during warm seasons.

Clean before fouling hardens

Soft fouling (algae, hydroids) is easy to remove. Once mussels or barnacles establish, cleaning becomes much harder and risks net damage.

Antifouling coatings extend intervals

Copper-based or silicone coatings can extend cleaning intervals by 50–100%. Factor coating type into your interval setting.

Method

Generates a recurring ICS event using RRULE with the specified day interval and 26 occurrences (~6 months). Calendar export uses RFC 5545 iCalendar format.

Validated

Last validated 2026-04-08. Calculations are designed for planning and documentation support; verify procurement decisions against manufacturer specifications or institutional SOPs.

How to cite

How to Cite

ConductScience Net Cleaning Schedule (v1.0). ConductScience, Inc. 2026. Available at: https://conductscience.com/tools/net-cleaning-schedule

Braithwaite RA, McEvoy LA. Marine biofouling on fish farms and its remediation. Advances in Marine Biology. 2005.

Fitridge I et al. The impact and control of biofouling in marine aquaculture. Biofouling. 2012.

Net Maintenance in Aquaculture

Net pen and cage aquaculture depends on clean, intact nets for fish containment and water quality. Biofouling — the growth of organisms on net surfaces — reduces water exchange by up to 50%, leading to low dissolved oxygen, high ammonia, and increased disease risk. Regular cleaning also prevents net failure, which can result in costly fish escapes. This tool generates recurring calendar reminders to keep net maintenance on schedule.

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