Outdoor filter for clean and healthy aquarium water: closed water circuit system for aquariums from 90 to 300 liters (80 to 120 cm). Fully equipped and ready for connection: integrated quick-priming device, filter start without water suction. Easy to assemble. Ultra quiet operation at a flow rate of 900 l/h. Patented pre-filtration with 100% larger surface area than the 901 model. High biological filtration capacity, vol. 7,6 l, water stop, 360° rotating hose connections, easy to replace filter media. TÜV tested, safe and highly energy efficient: lower power consumption than comparable previous models with the same output.