Oase Bio-Master External Aquarium Filter

Save £39.00

Size: 250
Sale price£194.99 Regular price£233.99


The ultimate competitor among the choices of modern external filters for aquariums. This is our favourite filter option of all here at Aquatech and the filter of choice by our services team when installing aquariums for clients.

Options are available for aquariums ranging between 250l and 850l and include a suitably rated heater with this 'Thermo' range. The integrated heater improves the efficiency of the heating system as water is naturally drawn over the heating element and heated water is pumped back into the aquarium, while also removing the clutter of extra equipment from the display aquarium.

The most convenient feature of this filter range however, is the excellent pre-filter which is superb and allows for very easy maintenance. Simply unlock the pre-filter with an easy to use valve and remove it for cleaning regularly to significantly reduce the need to clean the main filter body and media. The automatic shut-off and safety lock will prevent any unwanted water leaks, and the practical venting button makes the water suction highly effective and allows for a quick and convenient start.

The complete set includes filter media, hoses, adapters, suction and discharge pipes as well as the water diffuser and integrated, adjustable heater.


  • BioMaster 250

    Power consumption 15 W
    Max. flow rate 900 l/h
    Filter volume 4.4 l
    Pre-filter volume 0.40 l
    Number 42741

  • BioMaster 350

    Power consumption 18 W
    Max. flow rate 1100 l/h
    Filter volume 5.6 l
    Pre-filter volume 0.50 l
    Number 42742

  • BioMaster 600

Power consumption 22 W
Max. flow rate 1250 l/h
Filter volume 6.8 l
Pre-filter volume 0.60 l
Number 42743

  • BioMaster 850

Power consumption 32 W
Max. flow rate 1550 l/h
Filter volume 8 l
Pre-filter volume 0.60 l
Number 77119


Product Highlights

  • Highest quality, German Manufacturer with Extended Warranty of 4 YEARS
  • Includes all media for mechanical and biological with plenty of room for additional chemical filter media if required
  • Easiest Filter to maintain thanks to the revolutionary pre-filter design, which can be cleaned independently from the main filter body in less than 5 minutes
  • Additional integrated heater is available to add (Included in Thermo models) which keeps unsightly equipment out of the display aquarium, whilst also making the temperature control more efficient saving on electricity costs.
  • Low energy consumption with high flow
  • All quality pipework and parts included 

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