Filtreau Excellent Combi Drum 20/25 Low Trickle Add On

Filtreau Excellent Combi Drum 20/25 Low Trickle Add On

High Oxygen Bakki Shower Upgrade for the Filtreau 20/25 Low System

The Filtreau Excellent Combi Drum 20/25 Low Trickle Add On is a high performance biological shower module designed exclusively for the Filtreau Excellent Combi Drum 20/25 Low. It is not a standalone filter. Instead, it installs directly onto the 20/25 Low combi system to increase oxygenation and expand biological capacity in compact pond installations.

This upgrade enhances the low profile 20/25 system by introducing high oxygen trickle filtration. As a result, it improves water stability, strengthens biological performance and supports healthier koi and ornamental fish.

Because of its cascading tray configuration, many pond keepers refer to this type of unit as a Bakki shower.

High Oxygen Trickle Filtration in a Low Profile Format

As water exits the drum stage of the 20/25 Low, it flows over the shower trays and cascades down through the biological media. During this process, the water makes continuous contact with air. Consequently, dissolved oxygen levels increase significantly throughout the pond system.

Higher oxygen levels directly benefit koi and ornamental fish. Fish show improved vitality, stronger immune response and better overall condition. In addition, beneficial nitrifying bacteria perform more efficiently in oxygen rich environments. Therefore, ammonia and nitrite conversion becomes faster and more stable.

For compact pond installations where space is restricted, this low profile shower format delivers strong biological performance without increasing footprint width.

Expanded Biological Capacity

The 20/25 Low trickle add on increases the total biological surface area available within the system. This allows filtration performance to scale with fish stocking levels and feeding intensity.

Media is supplied separately. However, we strongly recommend high performance shower media such as Far Infrared media to maximise nitrification efficiency and gas exchange.

Because water flows over the media rather than through a submerged chamber, gas exchange improves considerably. As a result, ammonia processing efficiency increases and unwanted dissolved gases dissipate more effectively.

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Key Features

• Designed specifically for the Filtreau Excellent Combi Drum 20/25 Low
• High oxygen Bakki shower style biological upgrade
• Significantly increases dissolved oxygen levels
• Expands total biological filtration capacity
• Supports improved water stability and fish health
• Improves ammonia conversion efficiency
• Compact low profile footprint
• Durable outdoor rated construction
• Add on module only – not a standalone filter

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Technical Specifications

• Compatibility: Filtreau Excellent Combi Drum 20/25 Low
• Length: 660 mm
• Width: 320 mm
• Height: 822 mm
• Function: Biological trickle shower and oxygenation add on
• Installation Type: Add on module for existing 20/25 Low system
• Media: Supplied empty – suitable for Far Infrared media or high performance shower media
• Construction: Heavy duty weather resistant housing

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