With preset comfortable temperature. It could not be simpler: with the eheim aquarium heater thermopreset the comfortable temperature for the aquarium inhabitants is preset. Your tank keeps constant 25 degrees celsius. This is also the optimal temperature for the keeping of the most common aquarium inhabitants. The electronic control guarantees an extremely high precision temperature accuracy, the highly efficient heating element ensures an even heat distribution.. The eheim thermopreset bar heater is different from the eheim thermocontrol due to the additional plastic protection which ensures high mechanical stability. As usual from eheim, both heaters are equipped with an led light to control the heating function and a dry-running protection.. The new heater is available in four different performance classes, which are indicated by the number in the product name: thermopreset50 50w , thermopreset100 100w , thermopreset150 150w and thermopreset200 200w . Common to all variants is the slim design with a diameter of only 2,8 cm and a length of 17 to 25 cm, the heater is hardly visible also in small basins.. Advantages of the eheim thermopreset heater. High user-friendliness thanks to preset temperature. Due to short lengths also usable in small tank. Very narrow and therefore less visible in the aquarium. Plastic protection ensures high mechanical stability. High temperature accuracy due to electronic control. Even heat distribution thanks to the highly efficient heating ...