This powerful filter is a game-changer for your aquarium! The Penn Plax Cascade 20 is designed for tanks with a capacity of up to 7 gallons and a flow rate of 20 gallons per hour. It's perfect for keeping your fish healthy and happy. With its compact size of 6.5 x 6 x 5 inches and light weight of 1.2 pounds, this power filter is easy to install and use. It's also available for international shipping to select countries outside of the U.S. The Penn Plax Cascade 20 is a must-have for any fish tank owner who wants to maintain a clean and healthy environment for their fish.