An inline heater integrated into the external filter's hose eliminates the need for an in-tank heater.
Easy installation: connect the hose that returns water to the aquarium from the external filter. Place the external heater in the middle. Plug it in and set the temperature.
Connecting to the filter circuit ensures a very even distribution of water temperature with an accuracy of up to 0.5 degrees.
Package contents: one built-in 600 W heater, hoses for 12/16, 16/22, 19/25 and a cleaning brush.