Filtreau Excellent Mountain Tree Combi Drum 30/50 Low – Gravity Fed
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The Filtreau Excellent Combi Drum 30/50 Low Mountain Tree is a compact low profile drum filter featuring a rotating Mountain Tree biological drum and integrated 80W UV-C. Designed for both gravity fed fed installations, it delivers high flow mechanical separation and advanced biological stability for koi ponds up to 100m³. Ideal for filter pits with restricted height where performance cannot be compromised.
£6,415.33 (inc VAT)
Filtreau Excellent Mountain Tree Combi Drum 30/50 Low – Gravity Fed
Compact Rotating Biological Drum Filtration System
The Filtreau Excellent Combi Drum 30/50 Low Mountain Tree is a professional low profile filtration system designed for koi ponds where installation height is limited but performance must remain uncompromised. It combines precision 120 micron stainless steel drum filtration with a rotating Mountain Tree biological drum and integrated High Output UV sterilisation.
Unlike standard combi drum filters that use static biological chambers, this Mountain Tree model incorporates a rotating biological drum containing genuine Mountain Tree media. This rotating system increases oxygen transfer, improves nitrification efficiency and delivers stronger long term biological stability, particularly under heavier feeding regimes.
With an overall height of just 750mm, this low version is ideal for filter pits with restricted space while still providing full scale filtration performance.
The system is suitable for gravity fed installations, making it ideal for new builds, upgrades and retrofit projects.
Automatic Mechanical Drum Filtration
Water enters via 3 x 110mm inlets and passes through a Ø500 x 400mm stainless steel drum fitted with a 120 micron precision screen.
Solid waste, uneaten food and suspended debris are removed immediately before they degrade water quality. As the screen begins to restrict flow, a stainless steel float switch activates the automatic rinse cycle. Two 130Nm SPG drive motors rotate the drum while the internal 750W RVS 5 bar flushing pump powers high pressure spray nozzles.
Waste is flushed directly to drain, preventing organic build up and significantly reducing ammonia production before the water reaches the biological stage.
Maximum recommended flow rate is approximately 50m³ per hour, supporting pond volumes up to 100m³ depending on stocking density.
Mountain Tree Rotating Biological Drum
This model includes genuine Mountain Tree media:
• Lotus Root Bacteria House II
• Mountain Tree Spiral Filter Mat
The Lotus Root Bacteria House II features a porous lotus root structure with nanopores, creating a large surface area for beneficial bacteria colonisation. Its mineral composition assists in stabilising water parameters and supporting koi development.
The Spiral Filter Mat uses a patented 3D spiral design that improves oxygen circulation while reducing clogging risk.
Unlike static media chambers, the Mountain Tree media rotates continuously within a dedicated biological drum. This movement prevents channel formation, increases oxygen exposure and keeps the biofilm active. As a result, nitrification efficiency improves and long term biological stability increases.
The biological section is supported by 4 x 50 x 300mm air diffusers to maintain strong aeration. We recommend the Charles Austen ET150 Airpump for this filter system.
Integrated UV Sterilisation
The system includes:
1 x 80W High Output UV-C immersion module
Operating at 253.7nm, it suppresses algae spores and reduces harmful microorganisms as water passes through the unit. This supports clear water and reduces reliance on chemical treatments.
Key Features
- 120 micron stainless steel drum screen
- Ø500 x 400mm drum
- 2 x 130Nm SPG drive motors
- 750W internal high pressure flushing pump
- ting Mountain Tree biological drum
- Lotus Root Bacteria House II included
- Spiral Filter Mat included
- 4 air diffusers for enhanced bio aeration
- 1 x 80W High Output UV-C module
- Low profile 750mm height
- Suitable for gravity fed installations
- Designed for heavily stocked koi ponds
Technical Specifications
- Model: Filtreau Excellent Combi Drum 30/50 Low Mountain Tree
- Item Number: WMC45MTG
- Installation: Suitable for gravity fed systems
- Maximum Pond Volume: Up to 100m³
- Maximum Flow Rate: 50m³ per hour
- Drum Screen: 120 micron stainless steel
- Drum Size: Ø500 x 400mm
- Motor: 2 x 130Nm / 60W / 220V
- Flushing Pump: RVS 5 bar / 750W / 220V internal
- UV-C: 1 x 80W High Output immersion module
- s: 3 x 110mm
- Outlets: 2 x 110mm
- Air Supply: 4 x 50 x 300mm
- Dimensions:
- Length 1773mm
- Width 1163mm
- Height 750mm
- Media Included:
- Lotus Root Bacteria House II
- Spiral Filter Mat
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.
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