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.

The EasyClean pre-filter section can be simply removed for cleaning without the need to disconnect hoses and also features a robust built-in priming button for fast start up after cleaning or upon installation. The BioMaster also contains a series of fine and coarse filter sponges mounted inside the main filter section and 2 layers of OASE Hel-X 13 BioMedia. The combination of foams and bio-media offer superb mechanical and biological filtration and the main filter segment requires infrequent maintenance, thanks to the EasyClean Prefilter.