Oase BioMaster External Filters

The ultimate convenience among the external filters for aquariums. The external filter meets the highest demands in water filtration and filter cleaning. The combination of highly effective biological filtering with Hel-X and mechanical/biological cleaning with filter sponges ensures healthy and clear aquarium water. The BioMaster range is suitable for aquariums with a volume of 250 to 850 litres. No complete cleaning needed with the inbuilt Pre-Filter!