Thanks to the patented bimetal technology, which does not heat up like other conventional heaters, the EDEN RCA 300 heater always responds to the current water temperature. This way, even the smallest deviations from the preset temperature can be avoided. The precise adjustment of the thermostat control is made possible by a second patented system. Any discrepancies between the set temperature and the temperature measured by a separate thermometer can thus be corrected. This technology allows for a consistent water temperature without significant fluctuations. The RCA 300 heater is extremely robust, durable, and can be easily installed in the aquarium using the included bracket. An integrated indicator light clearly shows when the heating function is activated.