OASE BioMaster2 external filters

OASE BioMaster2 Thermo External Filter — German Engineering, Built-In Precision Heating

The OASE BioMaster2 Thermo is a premium canister filter from one of Germany’s most respected aquarium engineering brands, combining exceptional multi-stage filtration with an integrated inline heater — eliminating the need for a separate in-tank heater and delivering a cleaner, more streamlined aquarium setup. Reliable, powerful, and whisper-quiet, the BioMaster2 Thermo is the complete water management solution for the serious planted aquarium and community tank enthusiast.

Filtration and Heating, Unified

The BioMaster2 Thermo integrates a precision thermostat heater directly into the filter body, heating water as it passes through the canister and returning it to the aquarium at a consistent, accurate temperature. This eliminates the visual clutter of an in-tank heater, reduces equipment failure points, and ensures more even heat distribution throughout the aquarium. Combined with OASE’s proven multi-stage biological, mechanical, and chemical filtration system, the BioMaster2 Thermo delivers complete water quality and temperature control in a single, elegant unit.

Key Features

• Integrated Inline Heater: Built-in thermostat heater with precise temperature control — no separate in-tank heater required
• Multi-Stage Filtration: Generous filter media capacity across separate biological, mechanical, and chemical filtration chambers
• PreFilter Chamber: Accessible top-mounted pre-filter basket for easy maintenance without disturbing the main media — extends service intervals significantly
• Easy-Start Pump Head: Self-priming pump with push-button start — no siphoning required
• Whisper-Quiet Operation: OASE’s renowned low-noise engineering for near-silent running
• Aquastop Connector: Tool-free hose disconnection for clean, drip-free maintenance

Available Models

• BioMaster2 Thermo 250 — suitable for aquariums up to 250L
• BioMaster2 Thermo 350 — suitable for aquariums up to 350L
• BioMaster2 Thermo 600 — suitable for aquariums up to 600L

Why Choose the BioMaster2 Thermo?

The BioMaster2 Thermo is the ideal choice for aquarists who want a clean, uncluttered aquarium interior without compromising on filtration or temperature stability. Its large media capacity, easy-access pre-filter, and integrated heating make it one of the most practical and refined external filter systems available — a long-term investment in the health and presentation of your aquarium.

Precision-engineered in Germany, built for the long term — the OASE BioMaster2 Thermo is the external filter that does it all, beautifully.