The OASE BioMaster 2 Thermo 350 is the next generation of our best-selling BioMaster filter—reimagined with updated features, making it our most efficient and user-friendly filter yet. Designed with curved inlet and outlet tubes and adjustable flow control, it provides optimized water circulation and increased performance over previous models. Maintenance is simple with the EasyClean pre-filter module, which removes separately from the main filter to reduce mess, extend foam life, and improve efficiency. A built-in HeatUp heater maintains stable water temperature while eliminating the need for visible in-tank heaters, keeping your aquarium clean and uncluttered. The BioMaster 2 Thermo features a 4-stage sealed filtration pathway for superior water clarity. Water is filtered through fine and coarse foams, activated carbon, and Hel-X Biomedia for advanced mechanical, biological, and chemical filtration. High-quality materials, robust impeller, enhanced ventilation, and rubber feet that dampen vibration, all allow the filter to run quietly. Safety locks and a detachable aquastop valve make maintenance spill-free and easy. Perfect for freshwater and saltwater aquariums up to 90 gallons, the BioMaster 2 Thermo 350 is Italian-made, German-engineered, UL certified, and backed by a 4-year warranty (3 + 1 with registration).