Filtreau Moving Bed Filter

Need to add serious biological capacity after your drum? The Filtreau Moving Bed Filter FS412 gives you a dedicated bio stage designed to follow a mechanical pre-filter, keeping ammonia and nitrite under control in stocked koi ponds.

Why it’s a strong choice

• Dedicated moving bed biological chamber
• Ideal after a drum filter or sieve
• Designed to run with aerated media for high oxygen transfer
• Compact add-on unit within the Filtreau range

A moving bed works by constantly tumbling floating bio media in an air-driven chamber, maximising oxygen contact and keeping bacteria active.

Specifications

Feature	Detail
Product name	Filtreau Moving Bed Filter
Product code	FS412
Type	Biological moving bed chamber

Where it fits in your system

Typical gravity-fed layout:

Bottom drain → Drum filter → Moving Bed Filter → Pump → Return

Typical pump-fed layout:

Pump → Drum/Sieve → Moving Bed Filter → Return

Always install after mechanical filtration to prevent solids clogging the bio chamber.

Installation notes

• Fill with suitable floating bio media (e.g. Hel-X or similar).
• Use a correctly sized air pump and air diffuser to create a rolling “fluidised” bed.
• Allow space above the chamber for inspection and maintenance.

Maintenance

• Keep aeration running continuously.
• Check air stones or diffusers periodically.
• Inspect pipework and unions for leaks.

A simple way to expand your biological stage and stabilise water quality in koi systems.

Technical Data:

Max. flow: 20 m³/h (per 2X inlet / 2X outlet)

Dimensions unit: 550x550x750 mm

Qty in-outlet: 1X in / 1X out (optional: extra in/outlets)

Diameter in-outlet Ø: 110/110 mm