OASE BioMaster 2 850 Canister Filter
- Tanks up to 225 gallons
- 850 liters per hour flow
- 4-stage sealed path: foams, Hel-X, carbon
- EasyClean pre-filter removes separately
- Fittings, spray bar, tubing, 6 ft cord included
- 4-year warranty (3 + 1 with registration)
Updated 20 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A large canister filter for big freshwater and saltwater tanks, with a pre-filter that cuts cleaning time. The heater is an add-on per the bullets, and it is heavy to move.
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ASIN: B0F3LHYBNMModel: BioMaster 2 850Category: Aquarium Filters
Overview
Not a hang-on filter, the OASE BioMaster is an external canister for large aquariums. Water passes a removable pre-filter, then foams, Hel-X biomedia and carbon in a sealed path, and an optional HeatUp heater can sit inside the canister.
Fast maintenance on a big tank is the reason to buy: the pre-filter lifts out without opening the main canister. Safety locks and a detachable aquastop limit spills. The description calls the heater built in, but the bullets describe it as an add-on, so check before buying.
Who it's for
Large community, cichlid or reef tanks gain the most from the flow and media volume. Small tanks and nano setups would be blasted by this current.
Pros and cons
- Pre-filter cleans without opening canister
- Sealed multi-stage media path
- Spill locks and detachable aquastop
- Room for an internal heater
- Heater inclusion unclear in listing
- Heavy and tall unit
- Media replacement is ongoing
Performance notes
Flow drops as foams clog, so cleaning the pre-filter often holds output up and protects the main foams. The Hel-X biomedia gives bacteria surface to process waste. Tubing length and head height under the tank reduce real flow.
Specifications
| Brand | OASE |
|---|---|
| Model | BioMaster 2 850 |
| Dimensions & fit | |
| Tank size | Up to 225 gallons, freshwater and saltwater |
| Item weight | 8.55 kg |
| Item dimensions | 9.4 x 9.4 x 22 inches |
| Item Dimensions L X W X H | 9.4"L x 9.4"W x 22"H |
| Capacity & performance | |
| Flow Rate | 850 liters per hour |
| Power & efficiency | |
| Power Source | Corded Electric |
| Construction & materials | |
| Color | Blue |
| Material Type | Plastic |
| Included components | |
| Included Components | Curved inlet and outlet tubes, inlet strainer, outlet nozzle, spray bar with flow control, tubing, heater adapter, 6 ft power cord |
| Unit Count | 1 Count |
| Warranty & support | |
| Warranty | 4 years (3 + 1 with online registration) |
| Other details | |
| Filtration | 4-stage: fine and coarse foams, Hel-X biomedia, activated carbon |
| Heater | HeatUp heater integrates (heater adapter included) |
| Pre filter | EasyClean removable module |
| Country of origin | Made in Italy |
| Product Style | Modern and functional |
Frequently asked questions
What comes in the box with the OASE BioMaster 2 850?
Curved inlet and outlet tubes, an inlet strainer, outlet nozzle, modular spray bar with flow control, tubing, a heater adapter and a 6 ft power cord.
Does the OASE BioMaster 2 850 include a heater?
The bullets say a HeatUp heater can be integrated and include a heater adapter. The description mentions a built-in heater, so confirm the version before buying.
What tank size is the OASE BioMaster 2 850 for?
Freshwater and saltwater aquariums up to 225 gallons.
How do I clean the OASE BioMaster pre-filter?
The EasyClean pre-filter module removes separately from the rest of the filter, so it can be cleaned without opening the main canister.