Eheim ThermoPreset Aquarium Heater

Maintaining the perfect environment for your aquarium inhabitants is effortless with this advanced aquarium heater featuring a preset temperature of 25 degrees Celsius. Designed for both freshwater and marine aquariums, it ensures a stable, comfortable climate that supports aquatic life health and vitality.

The heater incorporates precise electronic control for exceptional temperature accuracy, paired with a highly efficient heating element that guarantees even heat distribution throughout the tank. Its slim, discreet design—with a diameter of just 2.8 cm and varying lengths suitable for small to larger basins—makes it unobtrusive and ideal for a range of aquarium sizes.

Durability and safety are paramount: the heater is encased in robust plastic protection, enhancing mechanical stability and longevity. It is equipped with dry-running protection to prevent damage if the heater operates without water, and an LED control lamp clearly indicates when the heating function is active. Secure installation is facilitated by included suction cups, ensuring the heater remains firmly in place.

Specifications Overview

Operating temperature fixed at 25.00 °C
Available in multiple power classes to suit aquariums from approximately 25 liters up to 400 liters
Compact design with diameters of 28.20 mm and lengths ranging from 17 to 25 cm
Voltage: 230 volts
Suitable for both freshwater and marine aquariums

50w Specification

Min. temperature 25.00 C
Max. temperature 25.00 C
Performance at 50 Hz 50.00 watt
For aquariums of about. 25.00 l
For aquariums up to approx. 60.00 l
Height 168.50 mm
Diameter 28.20 mm
Freshwater yes
Sea water yes
voltage 230 volt

100w Specification

Min. temperature 25.00 C
Max. temperature 25.00 C
Performance at 50 Hz 100.00 watt
For aquariums of about. 100 l
For aquariums up to approx. 150 l
Height 183.50 mm
Diameter 28.20 mm
Freshwater yes
Sea water yes
voltage 230 volt

150w Specification

Min. temperature 25.00 C
Max. temperature 25.00 C
Performance at 50 Hz 150.00 watt
For aquariums of about. 200 l
For aquariums up to approx. 300 l
Height 223.50 mm
Diameter 28.20 mm
Freshwater yes
Sea water yes
voltage 230 volt

200w Specification

Min. temperature 25.00 C
Max. temperature 25.00 C
Performance at 50 Hz 200.00 watt
For aquariums of about. 300 l
For aquariums up to approx. 400 l
Height 253.50 mm
Diameter 28.20 mm
Freshwater yes
Sea water yes
voltage 230 volt