Other Information : THIS 50 WATT HEATER STAT IS WATERPROOF AND FULLY SUBMERSIBLE. IT CONTAINS A NEW REVOLVING TEMPERATURE INDICATOR FOR EASY SETTING AND THE TEMPERATURE CONTROL RANGES FROM 18 - 32 DEGREES, IT ALSO CONTAINS A LIGHT WHICH INDICATES THAT THE HEATER IS ON. IT COMES PACKED IN AN ATTRACTIVE COLOURFUL PACKAGING AND IS SUITABLE FOR FRESHWATER AND SALT WATER AQUARIUMS.