OASE BioMaster² Thermo 250 Premium External Canister Filter

Take complete control of your aquatic environment with the OASE BioMaster 2 Thermo 250. Engineered in Germany and meticulously manufactured in Italy, this professional-grade secondary-generation multi-stage canister filter sets the absolute benchmark for premium aquarium filtration. Designed explicitly for high-demand aquascapes, heavy bioload tropical tanks, and marine setups up to 250 litres, the refined BioMaster 2 features an optimized inner water pathway that increases effective throughput while lowering raw operational energy requirements. The Thermo edition cleanly integrates a removable OASE HeatUp 150W adjustable thermostat heater directly inside its internal chassis, completely hiding bulky electrical elements from your pristine aquascape.

The centerpiece of the BioMaster 2's class-leading design is its proprietary EasyClean pre-filter module chamber. This innovative design isolates the coarse mechanical filtration pathway, allowing hobbyists to effortlessly slide out and rinse the pre-filter sponges without disturbing the main biological canister body or breaking the siphon connection. Supported by high-surface Hel-X biological media and a series of stratified filtration foams, this advanced system ensures the rapid breakdown of organic waste, toxic ammonia, and nitrite, resulting in crystal-clear water parameters and a thriving, balanced ecosystem.

Specifications

• Model Variant: OASE BioMaster 2 Thermo 250 (Gen 2 Series)
• Maximum Tank Capacity: 250 Litres
• Maximum Flow Rate: 700 L/Hr
• Maximum Head Height: 1.50 metres
• Power Consumption (Filter Pump): 15 Watts
• Integrated Thermostat Heater: 150 Watts (OASE HeatUp Model Included)
• Total Canister Volume: 4.40 Litres
• Pre-Filter Chamber Volume: 0.40 Litres
• Hose Connection Size: 12/16 mm ID/OD (4-metre length included)
• Dimensions (Length x Width x Height): 240mm x 240mm x 370mm
• Water Type Suitability: Fully certified for Freshwater and Marine / Reef installations
• Warranty Support: 3-Year Standard + 2-Year Extended OASE Manufacturer Guarantee

Key Features

• Integrated HeatUp System: Incorporates an adjustable OASE HeatUp 150W thermal element safely inside an internal canister sleeve to deliver uniform water heating without visible inside clutter.
• EasyClean Pre-Filter Column: Features a separate, rapid-release pre-filter chamber containing coarse 45 PPI foams that can be serviced independently to extend biological media lifespan.
• High-Surface Hel-X BioMedia: Packed with genuine Hel-X biological media providing a massive bacterial settlement area to guarantee rapid nitrification and clean nitrogen cycling.
• AquaStop Safety Locking Unit: Equipped with an integrated valve handle assembly that locks shut automatically to block any accidental water spills during maintenance routines.
• Responsive Self-Priming Button: Includes a physical mechanical priming pump mechanism at the top for fast, reliable siphon startup after setup or media cleaning cycles.