The Aqueon 200W Submersible Aquarium Fish Tank Heater is designed for use in up to 75 gallon aquariums. This heater, from the trusted brand Aqueon, is submersible, allowing it to efficiently heat the water in your fish tank from the bottom up. With a power rating of 200W, it provides reliable and consistent warmth to help maintain the ideal water temperature for your aquatic pets. Perfect for aquarium enthusiasts looking to keep their fish comfortable and healthy.