BioStyle Thermo 20

The OASE BioStyle Thermo 20 is a premium hang-on-back aquarium filter with an integrated heater, designed for aquariums up to 20 gallons (75 liters). Combining efficient multi-stage filtration with precise temperature control, this all-in-one solution simplifies aquarium maintenance while preserving a clean and modern aquascape appearance.

Engineered in Germany and manufactured in Italy, the BioStyle Thermo 20 integrates mechanical, biological, and chemical filtration into a compact external unit. The mechanical stage removes debris, uneaten food, and organic waste, maintaining crystal-clear water. The biological media provides ample surface area for beneficial bacteria that convert toxic ammonia and nitrite into safer nitrate, ensuring long-term biological stability. The chemical filtration component helps reduce discoloration and dissolved impurities for improved water quality.

What sets the BioStyle Thermo 20 apart is its integrated adjustable heater, discreetly built into the filter housing. This eliminates the need for a visible in-tank heater, keeping the aquarium interior clean and uncluttered. The integrated heating system ensures stable and consistent water temperature, which is essential for tropical fish, shrimp, and planted aquariums.

The cartridge-based filtration system allows quick and easy maintenance. Replaceable multi-stage filter cartridges and biological foam inserts maximize filtration efficiency while remaining beginner-friendly. An integrated cleaning indicator signals when servicing is required, helping maintain optimal performance.

The adjustable flow control system allows users to fine-tune water movement depending on livestock needs. This makes the BioStyle Thermo 20 ideal for Betta fish, nano community species, shrimp tanks, and small planted aquariums that require controlled circulation.

A telescopic intake tube adapts to different tank heights, ensuring installation flexibility. The hang-on-back design preserves valuable internal aquascape space while eliminating bulky equipment inside the tank. The secure mounting system provides stable positioning and safe operation.

Designed for quiet and energy-efficient performance, the OASE BioStyle Thermo 20 is perfect for living rooms, bedrooms, and office environments. Its compact footprint, integrated heater, and advanced filtration system make it an ideal solution for aquarists seeking simplicity, performance, and a clean aesthetic.

Key Features:

• - For aquariums up to 20 gallons / 75 L

• - Integrated adjustable heater

• - Multi-stage mechanical, biological, and chemical filtration

• - Replaceable cartridge system with biological foam

• - Adjustable flow control

• - Telescopic intake tube

• - Cleaning indicator

• - Quiet and energy-efficient operation

• - German engineered, made in Italy

The OASE BioStyle Thermo 20 delivers efficient filtration and stable temperature control in one compact hang-on-back system, making it perfect for small tropical freshwater aquariums.