How often should I change filters in a RAS?

Mechanical filters typically need cleaning every 1–7 days depending on load. Biological filter media should be replaced every 6–12 months. This tool helps schedule regular maintenance intervals.

What happens if I miss a filter change?

Delayed filter changes lead to reduced water quality, increased ammonia and particulate levels, biofilm buildup, and higher disease risk. Regular scheduling prevents lapses.

Should I change all filters at once?

For biological filters, stagger replacements to preserve beneficial bacteria. Replace no more than 30–50% of biological media at a time.

How do I import the .ics file?

Download the .ics file and import via Google Calendar (Settings > Import & Export), Outlook (File > Open > Import), or Apple Calendar (File > Import).

ToolsConductScience tool

AquacultureFree in-browser calculator

Filter Change Reminder.

Schedule recurring filter replacement reminders for your aquaculture system. Never miss a change.

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Validated2026-04-08

CitableMethods and citation included

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Load example filter reminder data to see the full workflow

Filter Parameters

Last Filter Change

Interval (days)

Preview

7/9/2026next filter change

Recurring every 30 days × 12 reminders

Interval

30d

between changes

Reminders

recurring events

Coverage

12mo

total span

When to use

Scheduling routine filter media replacement in RAS
Training new staff on maintenance intervals
Documenting maintenance schedules for facility records
Planning filter media purchases ahead of replacement dates

Do not use for

As a substitute for monitoring actual filter performance — check pressure differential and water clarity regularly
For emergency filter failures — those require immediate response, not scheduled reminders

Biomass load changes filter life

Higher stocking densities and feed rates shorten filter life. Reassess intervals when biomass increases significantly.

Pre-order replacement media

Order replacement filter media 1–2 weeks before the scheduled change to avoid supply delays.

Log every change

Keep a maintenance log alongside calendar reminders. Actual change dates may differ from scheduled dates, and the log helps optimize future intervals.

Method

Generates a recurring ICS event using RRULE with the specified day interval and 12 occurrences. 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 Filter Change Reminder (v1.0). ConductScience, Inc. 2026. Available at: https://conductscience.com/tools/filter-change-reminder

Timmons MB, Ebeling JM. Recirculating Aquaculture. Ithaca Publishing. 2013.

Losordo TM, Masser MP, Rakocy JE. Recirculating Aquaculture Tank Production Systems. SRAC Publication No. 452. 1998.

Filter Maintenance in Aquaculture

Filtration is the backbone of recirculating aquaculture systems (RAS). Mechanical filters remove solids, biological filters convert ammonia to nitrate, and chemical filters (activated carbon, UV) address specific contaminants. Neglecting filter maintenance is one of the most common causes of water quality crashes. Scheduled reminders ensure consistent maintenance even when operations are busy.

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