Filtreau Excellent Bio Drum 35 – Gravity Fed

Filtreau Excellent Bio Drum 35 Gravity Fed

High Performance Gravity Fed Mechanical Drum Filtration for Koi Ponds

The Filtreau Excellent Bio Drum 35 Gravity Fed is a professional mechanical drum filtration system designed for koi ponds and ornamental water features up to approximately 35000 litres. It is engineered specifically for gravity fed installations where the filter sits at pond water level and receives water directly from bottom drains.

With a maximum flow rate of approximately 35m³ per hour, this model provides efficient automated mechanical waste separation for medium sized pond systems. However, it focuses purely on mechanical filtration. Therefore, it is designed to operate ahead of a separate biological filter such as a moving bed, shower filter or multi bay system.

By removing solids before they reach the biological stage, the drum significantly reduces organic load. As a result, the downstream bio filter remains cleaner, more stable and more efficient over time.

Precision Mechanical Separation with Integrated UV Clarification

At the centre of the unit sits a stainless steel drum fitted with a precision 120 micron stainless mesh screen. This fine mesh captures fish waste, uneaten food and suspended debris before they break down in the system. Consequently, ammonia spikes are reduced and overall water clarity improves.

As debris builds up on the drum screen, a stainless steel float switch detects the restriction. It then activates the fully automatic cleaning cycle. The heavy duty SPG XL drive motor delivers 130Nm of torque to rotate the drum. At the same time, high pressure spray nozzles powered by the internal RVS 5 bar flushing pump clean the mesh and flush waste directly to drain. Therefore, the filter maintains peak mechanical efficiency without constant manual cleaning.

In addition, the Filtreau Excellent Bio Drum 35 Gravity Fed includes an integrated 80W High Output immersion UV C unit operating at 253.7nm. This UV system suppresses algae growth and reduces harmful pathogens as water passes through the chamber. As a result, it supports clearer and healthier pond water throughout the year.

After mechanical separation, water exits via 3 x 110mm outlets and flows to a separate biological filtration stage. Because the system separates mechanical and biological processes, you can size and configure your bio filter precisely to match fish stocking levels and feeding intensity.

Overall, the Filtreau Excellent Bio Drum 35 Gravity Fed delivers reliable automated mechanical waste removal and integrated UV clarification within a gravity fed configuration.

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Key Features

• Designed for gravity fed pond systems
• Suitable for koi ponds up to approximately 35000 litres
• Maximum flow rate up to approximately 35m³ per hour
• Precision 120 micron stainless steel drum screen
• Fully automatic self cleaning operation
• Industrial SPG XL drive motor delivering 130Nm torque
• Internal RVS 5 bar high pressure flushing pump
• Integrated 80W High Output immersion UV C unit
• 3 x 110mm gravity fed inlets
• 3 x 110mm outlets
• Designed to feed a separate biological filtration stage
• Control box included

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Technical Specifications

• Model type Gravity Fed Mechanical Drum
• Maximum flow rate approximately 35m³ per hour
• Suggested koi pond capacity approximately 35000 litres
• Dimensions approximately 1163mm L x 700mm W x 680mm H
• Inlets 3 x 110mm
• Outlets 3 x 110mm
• Drive motor SPG XL 130Nm 60W 220V
• Drum size 500 x 400mm
• Mesh 120 micron stainless steel
• Flushing pump RVS 5 bar 600W 220V
• UV units 1 x 80W High Output immersion
• Control box included
• Manufacturer code: WMC02DRG

Helpful Filtreau links and compatible products

Use these links to plan the rest of the pond filtration system around your Filtreau product. The right pump, pipework, air supply, UV spares and filter media will make the installation easier to set up, maintain and service.

• View the full Filtreau range
• Browse Filtreau drum filters
• Read our drum filter guide
• Compare all drum filters
• Choose a variable pond pump
• Choose a Charles Austen air pump
• Pressure pipe, valves and fittings
• View Filtreau UV-C units
• Find replacement UV lamps and quartz sleeves