With the EHEIM thermocontrol-e heating element, your fish can enjoy a perfectly regulated temperature in any aquarium. Sometimes, the simplest solutions are the best. This holds true for aquarium heaters as well. It is designed to be submerged in water, where it efficiently heats the environment. While the basic concept has remained unchanged for decades, the EHEIM controller heater has evolved into a highly advanced thermal device. The temperature can now be adjusted with precision, and the electronics ensure it is measured and maintained with greater accuracy. The specially designed laboratory glass coating enhances the heating surface, acts as a heat shield, and guarantees even heat distribution. No matter whether you have a 20 or a 1200-liter aquarium, there are 10 different sizes available to meet your needs.Benefits of the EHEIM control heater thermocontrol-eAccurate temperature settings ranging from 20 to 32 °CNo need for readjustmentsControl precision of ± 0.5 °CMaintains a consistent temperatureIndicator light shows the heating status (red: heating; green: temperature achieved)Fully submersible (waterproof)Equipped with dry-running protection (Thermo Safety Control)Glass coating enhances the heating surface and guarantees optimal, even heat distributionConvenient cable length of approximately 170 cmIncludes double suction holderAvailable in 10 sizes for aquariums from 20 to 1200 litersCompatible with both freshwater and saltwaterExceptional safety and reliability - 3-year warranty Precision, ease of use, quality, and safety.As you may know, fish from tropical and subtropical regions require a stable water temperature. Long ago, before engineer Eugen Jäger created the aquarium heater, there wasn't a satisfactory way to maintain the ideal water temperature. People utilized various complicated and sometimes odd methods, like placing the aquarium in sunlight or near a heater or stove.The EHEIM thermocontrol aquarium heater is an advanced version of the classic heating element, and the thermocontrol-e represents the latest electronically controlled model.Temperature can be accurately set between 20 to 32 °C, with a control precision of ± 0.5 °C.The temperature remains stable, and a control lamp indicates when the heater is in operation.This heater is completely waterproof, fully submersible, features dry run protection (Thermo Safety Control), and is suitable for both freshwater and saltwater environments. One of its most notable advancements is the glass coating:• It increases the heating surface,• compresses the heat, ensures optimal and consistent heat output, and• serves as a heat shield (the aquarium inhabitants can safely come into contact with it).The coating is made from specialized laboratory glass, designed for research purposes. Therefore, it is free from pollutants that could leach into the water. It is resistant to chemical and biological damage, with no cracks or hairline fractures to allow condensation to form. It is also impact-resistant and can withstand extreme temperature variations, such as those encountered during water changes.Diameter Ø:36 mmHeight:496 mmPower at 50 Hz:400 WattMax. temperature:32Sea water:YesMin. temperature:20 Freshwater:YesPackaging:6 Part (s)For aquariums up to approximately:1200 LitersFor aquariums of about:1000 LitersManufacturer warranty:3 Year(s)