Eheim thermocontrolᵉ heaters are made from high-impact, anti-thermal shock glass which is temperature shock and shock resistant.  

This type of glass enlarges the heating surface, compresses the heat, ensures optimal, even heat emission. The heat disperses more easily, meaning that the element does not need to get as hot (forming a heat shield which the aquarium habitants do not mind touching). This uses less electricity, meaning that you do not need a heater as big as some other brands i.e. a 300w Eheim thermocontrol heater is suitable for aquariums from 600 to 1000 litres (most 300w heaters from other brands will only do 400!).

Features:

• The temperature can be precisely adjusted from 20 to 32°c.
• No readjustment is necessary.
• Control accuracy is ± 0.5°c.
• Heat is kept at a constant level.
• Control lamp shows the heating function (red: heating up; green: temperature reached)
• Heater also has built-in Thermo Safety Control, which automatically switches the heater off should it run dry.
• Cable kink protection.
• Fully submersible.
• Double sealed to prevent the ingress of moisture.
• Impact resistant, even with extreme temperature fluctuations, such as those that may occur when changing the water. It does not affect this glass.
• Virtually unbreakable under normal operating conditions.
• Includes a double suction cup holder for mounting to the side of the aquarium.

All models are suitable for use in fresh water and marine aquariums and come with a 3-year manufacturer’s guarantee.

Specifications:

• Recommended Aquarium Size: 400-600 litres.
• Running power: 250w.
• Temperature Range: 20°-32°
• Accuracy: ±5°c.
• Power cable length 170cm.
• Voltage: 220-240v 50Hz.
• Maximum immersion depth: 0.5m.
• Dimensions: 442mm length x 36mm diameter.
• Suitable for use in fresh water and marine aquariums.
• Manufacturer’s guarantee: 3 years.