The Oase BioMaster Thermo 850 is a premium, German-engineered external canister filter manufactured in Italy. It is highly regarded by aquarists for its integrated heater and isolated pre-filter module, which drastically reduces standard tank maintenance.
The Oase Biomaster 850 Thermo is a high-performance external aquarium canister filter featuring an integrated adjustable heater, an Easy Clean pre-filter module, and a large biological filter volume.
Key Technical Specifications
- Tank capacity: Suitable up to 850 liters
- Max flow rate: 1,550 l/h
- Power consumption: 32 W (filter) + 400 W (heater)
- Dimensions: 240 x 240 x 535 mm
- Filter volume: 8 liters total (0.6 L pre-filter)
- Hose size: 16/22 mm (4 meters included)
- Max head height: 2.2 meters
Core Features & Maintenance
- Integrated Heating: Houses the adjustable Oase Heat Up heater inside the canister body, eliminating visible equipment in the main display tank.
- EasyClean Pre-Filter: Allows you to pull out, rinse, and reinsert the pre-filter module independently without unhooking the entire canister or disrupting main biological media.
- Safe Operation: Features an automatic shut-off valve and safety locking handle to prevent water spills during routine pre-filter maintenance.
- Easy Startup: Includes a practical built-in priming button for fast water suction during initial setup or after cleaning.
Images on how to use your Biomaster Thermo:















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