Oase BioMaster Thermo 350 B-stock

Oase BioMaster Thermo 350 B-stock

  • Easy Clean prefilter module
  • Including Heater
  • Flow control on the filter or via adapter set
  • With locking mechanism and safety lock
  • B-stock
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The external filter Oaser BioMaster Thermo meets the highest requirements for water filtration and filter cleaning. The combination of highly effective biological filtration by Hel-X and mechanical-biological cleaning by filter sponges ensures healthy and clear aquarium water. The EasyClean pre-filtering chamber allows for convenient filter cleaning. The Oase BioMaster is suitable for aquariums with a maximum volume of 850 l. The adjustable heater HeatUp is included in the scope of delivery.


  • EasyClean pre-filter chamber for extremely simplified filter cleaning and convenience
  • Adjustable Heater HeatUp included
  • Flow control on the filter or with adapter set
  • Large filter volume: The combination of mechanical and highly-effective biological filtration through Hel-X ensures healthy and clear aquarium water
  • Fine 45 ppi pre-filter foam for optimal mechanical filtration of the coarse debris and longer service life of the biological media
  • Shut-off automation and safety locking mechanism prevents undesired water escaping, e.g. when removing the pre-filter module
  • Practical vent button for effective water intake - for a fast and easy start up when installing and after cleaning
  • Complete Kit with filter media, hose and In- & Outflow
  • Not suitable for marine water (salt)
  • B-stock

Note - B-stock

This product is sold as B-stock. The packaging of the item is damaged.

Technical Data

Oase BioMaster Thermo - 350
Power consumption Filter 18 W
Power consumption Heater 200 W
Pump flow rate 1.100 l/h
Water column max. 1,4 m
Pre-Filtration volume 0,5 l
Filtration volume 5,6 l
Suitable for aquariums up to 350 l


Oase BioMaster Thermo - 350
Length 240 mm
Width 240 mm
Height 425 mm
Hose connection 17 mm or 16/22 mm
Power cord length 1,5 m


For initial setup and maintenance, we have written a helpful article in our Aquascaping-Wiki in German language.


Optionally, the pre-filter sponges can be upgraded to 30 ppi or 60 ppi subsequently. The other filter media can also be exchanged if required.

Scope of delivery

Oase BioMaster - 350
  • Passage ring for assembly HeatUp
  • Oase HeatUp 200
  • Blind plug
  • Handle (two tension latches are locked when the handle is folded)
  • Device head
  • Pre-filter with suction button
  • 45 ppi pre-filter sponges - 4x
  • Connection unit with hose nozzles output and input
  • Clamp lock
  • Rubber feet for safe stand
  • Container for filter material
  • Filter basket - 5x
  • Filter foam 30ppi - 1x
  • Filter foam 20ppi - 3x
  • Hel-X-Biobodies- 1x
  • Suction unit (inlet) including suction cups
  • Outflow unit (outflow) including suction cups



Founded in 1949, the traditional German company Oase from Hörstel in Germany is passionate about developing and selling professional equipment for all aspects of water. Filters, pumps, water conditioners, complete aquariums as well as fish food and accessories for aquaristics are part of the product range. With the biOrb product line, decorative and technically advanced all-in-one terrariums including accessories are also part of the portfolio. In addition, Oase is very successful worldwide in the garden, pond and waterworks sectors and, with Oase Professional, also offers solutions for hydraulic engineering, fountain technology and pond management.

General information

Item no.
Weight 5,60 kg
Shipping weight 10,90 kg

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