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

ENHANCED FLOW RATE: Updated connectors and improved water routing gives the BioMaster² 850 significantly higher flow rates for more uniform and healthier water conditions.
EASY MAINTENANCE: The BioMaster's EasyClean pre-filter module can be removed and rinsed without the need to dismantle the main filter body for quick, easy cleaning.
HIGH VOLUME: The 8L main filter volume paired with Hel-X biological media and mechanical/biological filter sponges supports huge colonies of beneficial bacteria.
VENTING BUTTON: The integrated venting button creates effective, automatic suction of water during installation or cleaning - no need for manual siphoning or airlocks.
HEATER-READY: Compatible with Oase's HeatUp adjustable heater, letting you keep equipment out of the tank and ensure even temperature distribution.