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OASE

OASE BioMaster 2 350 Canister Filter

  • Aquariums up to 90 gallons, freshwater and saltwater
  • 4-stage sealed filtration: foams, Hel-X biomedia, carbon
  • EasyClean pre-filter removes separately
  • Heater-ready for the OASE HeatUp, adapter included
  • 4-year warranty (3 + 1 with registration)
  • 9.4 x 9.4 x 16.7 in, 10 pounds

Updated 20 days ago · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A canister filter for mid-size tanks with a pre-filter you can rinse without opening the main canister. The HeatUp heater is an add-on, so budget for it if you want heating in the canister.

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ASIN: B0F3LPPPHHModel: BioMaster 2 350Category: Aquarium Filters

Overview

OASE built this canister filter around a sealed four-stage path of coarse and fine foams, Hel-X biomedia and activated carbon. A separate EasyClean pre-filter lifts out for rinsing while the main canister stays closed.

Cleaning only the pre-filter between full services cuts the messiest part of canister upkeep and extends foam life. Safety locks and a detachable aquastop limit spills. The heater module is optional, not part of the box.

Who it's for

Planted and community tanks in the mid-size range, where foam cleaning is a chore, suit the separate pre-filter. Owners of small tanks will find a canister of this size more than they need.

Pros and cons

Pros
  • Pre-filter cleans without opening canister
  • Safety locks reduce spills
  • Detachable aquastop valve
  • Rubber feet dampen vibration
Cons
  • Heater module sold separately
  • Flow rate figure looks unreliable
  • Tall body needs cabinet height

Performance notes

Clarity depends on water passing every stage in order, which the sealed path enforces. Rinsing the pre-filter often holds flow steady and spares the main foams. Flow control on the spray bar sets surface movement for each tank.

Specifications

BrandOASE
ModelBioMaster 2 350
Dimensions & fit
Tank sizeUp to 90 gallons
Item weight10 pounds
Item dimensions9.4 x 9.4 x 16.7 inches
Capacity & performance
Capacity350 liters
Max water temperature86 F
Maximum Flow Rate90 gpm
Upper Temperature Rating86 °F
Construction & materials
Material TypePlastic
Compatibility & installation
Installation TypeFreestanding canister
Included components
Included ComponentsCurved inlet and outlet tubes, inlet strainer, outlet nozzle, spray bar with flow control, tubing, heater adapter, 6 ft. power cord
Unit Count1 Count
Warranty & support
Warranty Description4 years (3 + 1 with online registration)
Other details
Filtration stages4
Purification MethodActivated Carbon, foams, Hel-X Biomedia
Max tds ppm300
Other Special Features Of The ProductHeavy Duty

Frequently asked questions

How do I clean the OASE BioMaster pre-filter?

The EasyClean pre-filter module removes separately from the rest of the filter, so you rinse it without opening the main canister.

Does the OASE BioMaster 2 350 include a heater?

The bullets say the HeatUp heater can be added and a heater adapter is included. The heater itself is not in the fittings list.

Can I use it on a saltwater tank?

Yes. It is listed for freshwater and saltwater aquariums.

How long is the warranty?

4 years: 3 years plus 1 with online registration.