Highly popular external canister filter 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 Technical data for Biomaster 250 Suitable for aquariums up to max. 250L Dimensions (L x W x H) 240 x 240 x 370mm Power consumption 15W Guarantee 3 years Max. flow rate 900 L/H Max. head height, metres 1.30m Connection for hoses ø (inner/outer) 16 / 22 mm Filter volume 4.4L Pre-filter volume 0.40L Suitable for freshwater Yes Suitable for saltwater Yes Technical data for Biomaster 350 Suitable for aquariums up to max. 350L Dimensions (L x W x H) 240 x 240 x 425mm Power consumption 18W Guarantee 3 years Max. flow rate 1100 L/H Max. head height, metres 1.40m Connection for hoses ø (inner/outer) 16 / 22 mm Filter volume 5.6L Pre-filter volume 0.50L Suitable for freshwater Yes Suitable for saltwater Yes Technical data for Biomaster 600 Suitable for aquariums up to max. 600L Dimensions (L x W x H) 240 x 240 x 480mm Power consumption 22W Power cable length 1.50m Guarantee 3 Years Max. flow rate 1250 L/H Max. head height, metres 1.80m Connection for hoses ø (inner/outer) 16 / 22 mm Filter volume 6.8L Pre-filter volume 0.60L Suitable for freshwater Yes Suitable for saltwater Yes Technical data for Biomaster 850 Suitable for aquariums up to max. 850L Dimensions (L x W x H) 240 x 240 x 535mm Power consumption 32W Power cable length 1.5m Guarantee 3 Years Max. flow rate 1550 L/H Max. head height, metres 2.20m Connection for hoses ø (inner/outer) 16 / 22 mm Filter volume 8L Pre-filter volume 0.60L Suitable for freshwater Yes Suitable for saltwater Yes