Fluval Chi Ii Filter Foam/Pad Combo Pack 12 Total Filters (9-Filter Pads and 3 Foam Pads) for Fluval Chi I/II Each Package Includes 3 Filter Pads and 1 Foam Pad (3 Packages Total) Helps keep water clear and clean Captures small particles and debris Works for past and present models of the Fluvial Chi aquarium