The Lifegard Aquatics 50 Watt Pre-Set Quartz Glass Aquarium Heater is a submersible heater safe for both freshwater and saltwater tanks from 10 to 20 gallons.
Features:
Set to 78 F. NOT adjustable.
Length: 5.5". 6 ft cord.
50 Watts. For aquariums from 10 to 20 gallons (assuming the temp needs be adjusted no more than 10 degrees)
UL Listed
Quartz glass tube
LED power light (red in heating mode, green when temp achieved & yellow when outside of water)
Thermal protection. The heater will automatically shut off if outside of water.