With the EHEIM precision heater, your fish will receive exactly the right temperature – in any aquarium. Obvious ideas are often the best. For example, the aquarium heater designed as a rod. The heating rod is simply suspended in the water and warms it up. The principle is still the same as it was decades ago. However, a lot has changed in the meantime. Today, the EHEIM regulation heater is a state-of-the-art electronic heating device at the forefront of technology. A jacket made of special laboratory glass increases the heating surface, serves as a heat shield, and ensures optimal, even heat distribution.