The EHEIM thermocontrol aquarium control heater is a further development of the legendary heating element and thermocontrol-e is the latest electronically controlled variant. The temperature can be precisely adjusted from 20 to 32 °C. The control accuracy is ± 0.5 °C. The heat is kept constant. A control lamp indicates the heating function. The heater is absolutely waterproof, can be fully immersed, has a dry run protection (Thermo Safety Control) and is suitable for fresh and marine water.