Newa Therm Mini K Product Details: Completely submersible, a miniature automatic aquarium heater. Made with extra tough polymer filled with epoxy resin, completely unbreakable. The heating element is highly efficient and compact with 10/20 W power. Supplied with suction cups. To prevent any damage caused by thermal shock or dry use each model is equipped with special thermal protector. Version with thermal protector: In cases where the heater runs dry, or is removed from the water while still switched on, the thermo-fuse switches off the heater. Once the heater has cooled, or when it is reimmersed, the heater starts to function again because the thermo-fuse is re-usable. Features: • Ideal for indoor aquaria and terrariums with a capacity from 12 litres to 20 litres. • The heater can also be placed in horizontal position, fixed on the bottom of the tank • It is recommended to place the heater in an area where there is good water circulation • The versions without a thermostat are best used with a supporting thermometer.