Indulge your aquarium in world‑class engineering with the Oase BioMaster² Thermo 850, a flagship external canister filter crafted for aquarists who refuse to compromise. Designed for freshwater and marine systems up to 850 litres, this elite filtration system blends power, precision, and sophistication into one seamless unit.
With its integrated 400W adjustable heater, the BioMaster² Thermo 850 removes visual clutter from your aquascape, preserving the purity of your design while maintaining flawless temperature stability. The signature EasyClean pre-filter module transforms maintenance into a quick, effortless ritual — keeping your water pristine without disrupting your setup.
This is filtration reimagined for luxury aquariums.
A Display Without Distractions The built‑in heater disappears from view, allowing your aquascape to shine in its full elegance.
Exceptional Water Clarity Advanced mechanical and biological filtration ensures a crystal‑clear environment worthy of premium livestock.
Effortless Maintenance The EasyClean pre-filter extends service intervals and keeps your main media performing at peak efficiency.
Whisper‑Quiet Performance Engineered for silent operation, perfect for living spaces, offices, and high‑end installations.
Superior Water Movement A powerful 1,500 L/h flow rate enhances oxygenation and nutrient distribution throughout the aquarium.
Suitable for aquariums up to 850L
400W integrated adjustable heater
EasyClean pre-filter module
1,500 L/h maximum flow rate
8L total filter volume
0.6L pre-filter chamber
Premium Hel‑X biological media & high‑grade filter sponges
Secure shut-off valves for clean, leak‑free maintenance
Ideal for freshwater & marine environments
Recommended Tank Size: Up to 850L
Flow Rate: 1,500 L/h
Filter Volume: 8L
Pre-filter Volume: 0.6L
Heater: 400W integrated
Power Consumption: 32W (filter)
Max Head Height: 2.2m
Hose Size: 16/22mm
Dimensions: 240 × 240 × 535mm
Cable Length: 1.5m
BioMaster² Thermo 850 External Filter
Integrated 400W Heater
EasyClean Pre-filter Module
Hel‑X Biological Media
Mechanical Filter Sponges
Filter Baskets
Hoses & Connectors
Intake & Outlet Pipes
Installation Accessories
Assemble the filter and install the included media.
Connect the intake and outlet hoses to your aquarium.
Set your desired temperature on the integrated heater.
Prime using the built‑in priming pump.
Switch on the filter and enjoy flawless, stable filtration.
Rinse the EasyClean pre-filter regularly to maintain optimal flow.
For large planted displays, vibrant cichlid tanks, or refined marine systems, the BioMaster² Thermo 850 delivers unmatched performance with minimal effort. Its hidden heater, generous biological capacity, and effortless maintenance make it the perfect choice for aquarists who value both beauty and reliability.
This is not just a filter — it’s an upgrade to the entire aquarium experience.
