Oase BioMaster² 850 External Aquarium Filter

Engineered for aquariums up to 850 litres in volume, it boasts an impressively high maximum flow rate of approximately 1500 litres per hour and a head height of up to 2.2 metres, making it well‑suited for large tanks requiring strong circulation and robust filtration.

What really sets the BioMaster² 850 apart is its user‑friendly design. The EasyClean pre‑filter module enables quick removal and rinsing of the foam filter without dismantling the entire canister, which significantly simplifies routine maintenance and reduces downtime. The unit also includes a dedicated priming (venting) button for effortless start‑ups and restarts, alongside an automatic shut‑off mechanism and safety valve that prevent unwanted water discharge when servicing the filter, helping to avoid leaks and mess.

Inside, water flows through multiple stages of filtration, including mechanical sponge media and biological media such as Hel‑X biomedia, which offers a high surface area for beneficial bacteria to colonise. This combined approach ensures that your aquarium water remains clear, healthy and biologically stable. Energy consumption is also efficient: with rated power at 32W and typical operating conditions around 21.4W, the BioMaster² 850 is both powerful and economical to run. 

For aquarists with large freshwater or saltwater systems who prioritise high‑quality filtration, low‑maintenance upkeep and long‑term reliability, the Oase BioMaster² 850 External Aquarium Filter is an excellent choice.

Key Features

Specification

PDF Downloads

BioMaster² Instructions