The Marineland Activated Carbon Bags C-Series Canister Filters Rite-Size S/T, 2 pk is a perfect addition to your aquarium filter system. These bags are designed to fit canister filters and have a tank capacity of 100 gal. They are suitable for all water types and are made by Marineland, a trusted brand in the aquarium industry. These bags are ideal for removing impurities and excess nutrients from your aquarium water, helping to maintain a healthy and balanced ecosystem. They are easy to install and replace, and are a great choice for both freshwater and saltwater aquariums. Made in China, these carbon bags are a must-have for any aquarium enthusiast looking to provide their fish with clean and healthy water.