Eheim Thermocontrol-E Submersible Heater 300 Watt
The Eheim Thermocontrol-E is a high-performance, fully submersible aquarium heater suitable for both freshwater and saltwater tanks. It features precise temperature control between 20°C and 32°C with an accuracy of within 0.5°C. The unit includes dry-running protection for enhanced safety.
Designed with a state-of-the-art glass jacket, the heater increases the heating surface area and acts as a heat shield, ensuring even and efficient heat distribution throughout the tank.
Key Features
- Temperature range: 20°C to 32°C
- Temperature accuracy: ±0.5°C
- Dry-running protection for safety
- Full submersion design with classic hang-in-the-water setup
- 170 cm long power cable
- Double suction cup holder for secure positioning
| Feature | Specification |
|---|---|
| Heating Power | 300 watts |
| Operating Temperature Range | 20°C to 32°C |
| Accuracy | ±0.5°C |
| Construction | Glass jacket with heat shield |
| Power Cable Length | 170 cm |
| Mounting | Double suction cup holder |
FAQ
What is the temperature range of the Eheim Thermocontrol-E heater?
The heater operates between 20°C and 32°C with an accuracy of ±0.5°C.
Does the heater have safety features to prevent overheating or dry running?
Yes, the unit includes dry-running protection to prevent damage if the heater is left without water.
Can this heater be used in both freshwater and saltwater tanks?
Yes, the Eheim Thermocontrol-E is suitable for both freshwater and saltwater aquariums.

Angela McGrath –
This heater has been running smoothly in my 120-liter saltwater tank for over six months. The temperature stays consistent and I don’t need to adjust it often. The glass jacket helps distribute heat evenly and the suction cups hold firmly in place. No issues with overheating or power fluctuations.
Yvonne Cameron –
I switched from an older model and noticed a big improvement in temperature stability. The heater maintains the set point very precisely, even during temperature fluctuations. Easy to install and the cable is long enough for my tank setup.
Gavin Nash –
Works well in my freshwater tank. The temperature control is accurate and the heater doesn’t overheat. The only minor issue is that the suction cups need to be repositioned occasionally due to tank movement.