Oase BioMaster External Filters

The Oase BioMaster is a canister filter designed to make maintenance quicker and easier. Its key feature is the front pre-filter: mechanical sponges sit in a separate chamber that you can open and rinse without opening the main canister, so the biological media stays undisturbed and your bacteria colony keeps working.

BioMaster filters come in several sizes, including the BioMaster 250, 350, 600 and 850, all with large media baskets for sponge, Hel-X biological media and chemical media. BioMaster Thermo models add a built-in HeatUp heater inside the filter, so there is no heater in the tank to spoil the view or be damaged by large fish. Quiet running, a self-priming design and easy-to-use taps make BioMaster filters a good fit for planted tanks, cichlids and busy community aquariums.

Clean the pre-filter sponges every few weeks in old tank water, and only rinse the main media when flow drops. Keep spare sponges and seals from our Oase filtration range on hand, and add nitrifying bacteria when setting up a new filter. Compare the full Oase external filters range, or see Eheim external filters and Fluval external filters.

Charterhouse Aquatics is an Oase stockist with fast UK delivery.