The OASE BioMaster series is an externally mounted aquarium filter with integral powerful pump. The filter is designed for fresh water or marine aquariums from up to 250L - 850L. The BioMaster is designed and engineered in Germany and is packed with innovations to make the task of aquarium filtering as simple and efficient as possible. 

• EasyClean pre-filter chamber for extremely simplified filter cleaning and convenience
• Adjustable Heater HeatUp can be retrofitted
• Flow control on the filter or with adapter set
• Large filter volume: The combination of mechanical and highly-effective biological filtration through Hel-X ensures healthy and clear aquarium water
• Fine 45 ppi pre-filter sponge (30ppi for Biomaster 850) to optimize mechanical filtration of coarse dirt and prolong the lifespan of biological media
• Shut-off automation and safety locking mechanism prevents undesired water escaping, e.g. when removing the pre-filter module
• Practical vent button for effective water intake - for a fast and easy start up when installing and after cleaning
• Complete Kit with filter media, hose and In- & Outflow