Interpet Delta Therm water heaters has Australian standards certification 'C tic' which sets them apart from a lot of items offered on the market. This is a precise and reliable temperature control, double insulated and fully submersible, and is ideal for marine or freshwater fish. Easy to adjust temperature control from 16-34C. On/off light indicates when the heater is operating. Heat and shock resistant glass for added safety.
Follow directions on label.