Innovative external heater for aquariums with high efficiency and durability. Technology with protective Ptc film that avoids overheating for maximum safety. Also suitable for external filters and sump collection tanks, it should be positioned only vertically. Complete with special eyelet for fixing, connectable to pipes and other accessories for aquariums. Precise thanks to the electronic temperature control, which can be set between 18° C and 34° C. The heater can be combined with the Hydor Prime external filter. Regular cleaning of the heating tube with a soft brush is recommended to prevent algae and limestone Power 300 W. Overall dimensions: height 30,5 cm. Inner tube diameter: 16 mm. Recommended for aquariums from 100 to 200 litres with Δ up to 8° C, aquariums from 100 to 180 litres with Δ up to 10° C.