This Aqueon Submersible Aquarium Heater is perfect for fish and aquarium enthusiasts who want to keep their tanks at optimal temperatures. With a power output of 100 watts, this heater is ideal for tanks with a capacity of up to 40 gallons. The heater is designed to be submerged in the tank, making it a perfect addition to your aquarium decor. The Aqueon Submersible Aquarium Heater is made by a trusted brand and is designed to work with fresh water. It comes with a model number of 100528586 and is categorized under Heaters & Chillers, Fish & Aquariums, and Pet Supplies. This heater is perfect for those who want to keep their fish healthy and happy.