Brand New never used/open Aqueon QuietFlow Internal Shrimp Filters are specially designed for freshwater aquariums containing shrimp, small fish and other invertebrates. This filter includes a protective intake grid and pre-filter foam sponge that prevents livestock from entering the filter housing. Maintenance is easy, simply remove, rinse and replace the intake grid and pre-filter. Each unit is preloaded with a replaceable Aqueon carbon cartridge. For easy placement, both hanging clips and suction cups are provided; use the hanging clips for aquariums with top frames and suction cups for frameless aquariums. - For use with aquariums up to 20 Gallons - Includes carbon cartridge, media sponge, and additional biological filtration - Easy installation, no priming needed - For freshwater aquariums up to 20 Gallons - Hanging clips and suction cups provide placement options - Replacement cartridge size Medium