The Oase BioMaster Thermo 250 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 250 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 Size: Up to 250 liters (Recommmended for 60 – 80L)
- Flow Rate: 900 liters per hour
- Power Consumption: 15 W (filter) + 150 W (integrated HeatUp heater)
- Dimensions: 240 x 240 x 370 mm
- Filter Volume: 4.4 liters (plus 0.40 liters pre-filter)
- Hose Size: 16/22 mm
- Max Head Height: 1.30 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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