Aqueon Quietflow Internal Shrimp Filter 20g for Shrimp and Plants with Cartridge Description: Includes M Medium Filter Cartridge. For freshwater aquariums up to 20 gallons. Efficiently cleans and filters water. Ideal for framed or fremelss aquariums. Includes carbon cartridge, media sponge and additional biological filtration. Protective screen and foam intake protects shrimp, small fish and other invertebrates. New in open box. Please see photos. Sold as pictured and described. We ship as soon as possible - paid orders usually ship same business day or next business day. We carefully inspect all items for flaws; however, if we happen to miss something, please know that this is NOT intentional and we want to make it right immediately. Please contact us or go through returns. Thank you! We appreciate you! Visit www.krausehaussiftandthrift.com for other amazing bargains, updated daily!