Fluval AquaClear Filter Inserts feature activated carbon and work to trap particles and debris to improve water clarity and provide a healthy aquatic environment. These inserts aid in your mechanical filtration system while helping provide biological filtration as well, and are safe for use in both fresh and saltwater aquariums.
Features: Works to improve water clarity in both fresh and saltwater aquariums; Foam traps particles and debris to help aid in mechanical filtration
Intended For: AquaClear 20 Power Filter
Capacity: For use in 5-20 gallon (18-76 L) Aquariums