Eheim ThermoControl Heater 300w

EHEIM ThermoControl Heater – Precision Heating for Every Aquarium

The EHEIM ThermoControl range brings trusted German engineering to your aquarium, offering precise temperature regulation, safety features, and long-lasting performance. With options for tanks from 20 to 1000 litres, each model ensures stable heating to keep your fish comfortable and healthy.

All heaters feature an adjustable temperature range of 18–34 °C, a ±0.5 °C control accuracy, and a durable, pollutant-free glass jacket for even heat distribution and added safety. Fully submersible and equipped with an automatic dry-run shut-off system, these heaters are built to perform reliably in both freshwater and marine tanks.

Choose the model that’s right for your setup:

EHEIM ThermoControl 25W
Suitable for aquariums up to 25 litres
Compact and ideal for nano and small tanks
Dimensions: Ø36 mm x height 243 mm
Cable length: approx. 170 cm

EHEIM ThermoControl 50W
Suitable for aquariums up to 60 litres
Perfect for small freshwater or marine tanks
Dimensions: Ø36 mm x height 243 mm

EHEIM ThermoControl 100W
Suitable for aquariums up to 150 litres
Reliable heating for larger aquariums 
Dimensions: Ø36 mm x height 319 mm

EHEIM ThermoControl 150W
Suitable for aquariums up to 300 litres
Reliable heating for larger aquariums 
Dimensions: Ø36 mm x height 345 mm

EHEIM ThermoControl 200W
Suitable for aquariums up to 400 litres
Reliable heating for larger aquariums 
Dimensions: Ø36 mm x height 406 mm

EHEIM ThermoControl 250W
Suitable for aquariums up to 600 litres
Reliable heating for larger aquariums 
Dimensions: Ø36 mm x height 452 mm

EHEIM ThermoControl 300W
Suitable for aquariums up to 1000 litres
Ideal for large aquariums or high-temperature species
Dimensions: Ø36 mm x height 506 mm

All models include:

• Precise temperature control (18–34 °C)
• Recalibration option (±2 °C)
• Highly accurate thermostat (±0.5 °C)
• Constant, even heat emission
• Fully submersible and watertight design
• Thermo Safety Control (automatic dry-run shut-off)
• Laboratory-grade glass jacket
• Safe for freshwater and marine environments
• 170 cm cable and suction cup holder included
• 3-year manufacturer's warranty

From small desktops to large show tanks, the EHEIM ThermoControl heater range offers safe, effective heating you can rely on.