Filtreau Excellent Combi Drum 25/30 Trickle Add On

Filtreau Excellent Combi Drum 25/30 Trickle Add On

High Oxygen Bakki Shower Upgrade for the Filtreau 25/30 Combi System

The Filtreau Excellent Combi Drum 25/30 Trickle Add On is a high performance biological shower module designed exclusively for the Filtreau Excellent Combi Drum 25/30. It is not a standalone filter. Instead, it installs directly onto the 25/30 combi system to increase oxygenation and expand biological capacity in koi pond installations.

This upgrade enhances the standard 25/30 combi 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 style of unit as a Bakki shower.

Increased Oxygenation Through Trickle Filtration

As water exits the drum stage of the Combi 25/30, it flows over the shower trays and cascades down through the biological media. During this process, the water makes extensive contact with air. Consequently, dissolved oxygen levels rise significantly across the pond system.

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

For medium sized koi ponds operating at higher stocking levels, this additional oxygenation provides noticeable improvements in overall filtration efficiency.

Expanded Biological Capacity

The 25/30 trickle add on increases the total biological surface area available within the system. This allows filtration capacity to scale with fish stocking density 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 25/30
• 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 footprint suited to the 25/30 system
• Durable outdoor rated construction
• Add on module only – not a standalone filter

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Technical Specifications

• Compatibility: Filtreau Excellent Combi Drum 25/30
• Length: 660 mm
• Width: 320 mm
• Height: 822 mm
• Function: Biological trickle shower and oxygenation add on
• Installation Type: Add on module for existing 25/30 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