OASE BioMaster² 850 Aquarium Filter, Fish Tank Filter suitable for Freshwater and Marine Aquariums up to 850 L, 32 W

EASYCLEAN PREFILTER MODULE: No more bothersome dismantling of the filter - simply remove the pre-filter module, rinse and replace INCREASED FLOW RATE: Thanks to optimised water routing and a new connection set, it has been possible to significantly increase the flow rate compared to the previous model. PRACTICAL: Venting button for effective water suction - to get started quickly and easily during installation and after cleaning LARGE FILTER VOLUME: The combination of highly effective biological filtering with Hel-X and mechanical/biological cleaning with filter sponges is ideally coordinated to ensure healthy and clear aquarium water. The water flows through the pre-filter first, ensuring an extra-long service life. OPTIMUM FILTRATION: Fine 30 / 45 ppi pre-filter sponge for optimum mechanical filtration of coarse dirt and longer service life of the biological media. LONGER SERVICE LIFE: For an even longer service life, you are welcome to use our biological filter media SAFE: The shut-off mechanism makes it easy to disconnect from the water circuit. Thanks to the safety valve, unintentional water leakage is prevented. ECONOMICAL & QUIET: Runs quietly and saves energy