Introducing the Tetra Whisper Bio-Bag Cartridge Medium 3 pk, perfect for fish and aquarium enthusiasts. This high-quality box filter is designed to keep your tank clean and free from harmful bacteria. With a tank capacity of 60 gallons, this filter is suitable for all water types and is located internally for optimal performance. The Tetra Whisper Bio-Bag Cartridge Medium 3 pk is manufactured in the United States and is a must-have for any pet supplies collection. It is specifically designed for fish and aquariums, making it a great addition to your collection. Get your hands on this amazing product today and keep your tank clean and healthy!