The Oase HeatUp 25 Watt is a fully submersible heater with adjustable temperature control and a light that shows when it is heating. It uses bi-metal technology to hold a uniform temperature.
Power: 25 watts, recommended for tanks up to 10 gallons
Glass construction, fully submersible
Suction cups and bracket for mounting
Control light shows when heating
About 8 in long, UL listed
For freshwater and saltwater
Mount the heater with the suction cups and bracket and check the water temperature with a thermometer.