The thermocontrol's electronically controlled variant is called the Eheim Thermocontrol e. The thermocontrol-e improves accuracy while maintaining the excellent quality, safety, and ease of use of its predecessor. Over time, the Eheim heater has developed into a cutting-edge thermal appliance. The electronics in the Eheim Thermocontrol e-heater make it simpler to achieve and maintain a precise temperature. The laboratory-grade glass coating, which compresses heat and increases heating surface, is the biggest improvement. Glass ensures even heat emission and serves as a heat shield that won't hurt occupants. Because lab-grade glass is pollution-free, it won't release any undesirable substances or elements into the water. There are no cracks in the heater housing for