This PETCO Submersible Aquarium Heater is perfect for aquariums up to 75 gallons. It provides reliable heating for your aquatic pets, ensuring they stay comfortable and healthy. Made by one of the leading brands in pet supplies, this heater is designed to be durable and long-lasting. Whether you have a tropical or marine aquarium, this 300-watt heater is ideal for maintaining the ideal temperature. The submersible design ensures that it stays out of sight and doesn't take up valuable space in your tank. With easy-to-use temperature controls, this heater will be up and running in no time, so you can get back to enjoying your underwater world.