Oase BioMaster 850 External Filter

EasyClean pre-filter module – Module can be removed separately from the rest of the filter. This reduces maintenance, increases filter efficiency, and extends the life of main filter foams. Customize the pre-filter with coarse 30 ppi, fine 45 ppi, ultra-fine 60 ppi, and activated carbon 45 ppi filter foams Ideal for use in aquariums up to 70 Gallons.Sealed filtration pathways – Allows for the full benefits of all four stages of filtration through this intuitive design. Hel-X Biomedia – An extremely large protected settlement surface (800m2/1000 liter) that allows beneficial bacteria to grow and thrive. The material is designed to stop floating as soon as it reaches a certain level of bacteria colonization. Carbon pre-filter foams – Activated carbon absorbs unwanted substances in aquarium water. Carbon filter foams make replacement much simpler than using common granular carbon.Carbon pre-filter foams – Activated carbon absorbs unwanted substances in aquarium water. Carbon filter foams