The Submersible Aquarium Heater 100 Watt is a reliable and efficient heating solution for aquariums. With a size of 100-Watt and a maximum temperature setting of 20.0 degrees, this heater can effectively maintain the temperature in a 20-30 square foot area. The radiant heating method and coil heating element provide consistent and safe heat for your aquatic pets. Made of glass and weighing 0.62 pounds, this floor-mounted heater is easy to use and suitable for indoor use. Ship globally and powered by a corded electric source, this model by Fluval is a practical and necessary addition to any aquarium setup.