Oase BioMaster High-Demand External Aquarium Filters - Optional Heater Models

Atlantic® Oase SKU: 55145

$233.99

Shipping calculated at checkout

Oase BioMaster Units

  • 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
  • No mess maintenance – Integrated safety locking features on the handle, pre-filter, and check valve in the inlet/outlet connection unit, ensure no accidental spillage or messy maintenance
  • 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.
  • Adjustable flow control – Flow can be adjusted for the inlet and outlet in multiple locations on the filter assembly
  • Easy priming – Includes simple priming for fast and easy startup and continued operation
  • Quiet operation – Sound dampening design
  • Heater integration capability  Easily integrate an OASE HeatUp adjustable heater into the BioMaster canister (HeatUp not included in BioMaster Units)  - See bottom of the page for all related parts.
  • Made in Italy, backed by German engineering
  • Fresh and marine water compatible
  • UL certified filter
  • 3 year warranty plus 1 year warranty extension with online registration

Oase BioMaster Units Include:


Aquarium Filter, four carbon pre-filter foams, one 20 ppi filter foam, two 30 ppi filter foams, Hel-X Biomedia, intake tube with inlet strainer, water distributor nozzle, spray bar, inlet and outlet adapters with flow control, tubing, fittings, heater adapter, and power cable


Model Part # Power Consumption Power Cord Length Max Flow Rate Max Head Height Connection Tubing Length Suitable For Maximum Aquarium Volume Dimensions
BioMaster 250 55145 15 W 6 ft 250 GPH 5.6 ft 5/8 in ID 13 ft 70 gallons 9.4 x 9.4 x 14.6 in.
BioMaster 350 55146 16 W 6 ft 300 GPH 5.9 ft 5/8 in ID 13 ft 90 gallons 9.4 x 9.4 x 16.7 in.
BioMaster 600 55147 23 W 6 ft 350 GPH 6.6 ft 5/8 in ID 13 ft 160 gallons 9.4 x 9.4 x 19 in.
BioMaster 850 77116 25 W 6 ft 400 GPH 7.4 ft 5/8 in ID 13 ft 225 gallons 9.4 x 9.4 x 22 in.
BioMaster Thermo 250 55148 15W  6 ft 250 GPH 5.6 ft 5/8 in ID 13 ft 70 gallons 9.4 x 9.4 x 14.6 in.
BioMaster Thermo 350 55149 16W 6 ft 300 GPH 5.9 ft 5/8 in ID 13 ft 90 gallons 9.4 x 9.4 x 16.7 in.
BioMaster Thermo 600 55150 23W 6 ft 350 GPH 6.6 ft 5/8 in ID 13 ft 160 gallons 9.4 x 9.4 x 19 in.
BioMaster Thermo 850 77118 25W 6 ft 400 GPH 7.4 ft 5/8 in ID 13 ft 225 gallons 9.4 x 9.4 x 22 in.
BioMaster Thermo Units:

  • Integrated heater – Provides precise and uniform temperature levels and reduces the amount of equipment seen inside the aquarium by housing the heater in the unit
  • 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
  • No mess maintenance  Integrated safety locking features on the handle, pre-filter, and check valve in the inlet/outlet connection unit, ensure no accidental spillage or messy maintenance
  • 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.
  • Adjustable flow control – Flow can be adjusted for the inlet and outlet in multiple locations on the filter assembly
  • Easy priming – Includes simple priming for fast and easy startup and continued operation
  • Quiet operation – Sound dampening design
  • Made in Italy, backed by German engineering
  • Fresh and marine water compatible
  • UL certified filter, UL certified heater
  • 3 year warranty plus 1 year warranty extension with online registration
BioMaster Thermo Units Include:




Aquarium Filter with an integrated heater, four carbon pre-filter foams, one 20 ppi filter foam, two 30 ppi filter foams, Hel-X Biomedia, intake tube with inlet strainer, water distributor nozzle, spray bar, inlet and outlet adapters with flow control, tubing, fittings, heater adapter, and power cables


Related Products

Questions & Answers

Have a Question?

Be the first to ask a question about this.

Ask a Question