HAGEN Elite Foam Cartridge for A50 (2/pack)Elite Foam Cartridge for A50 (2/pack) ELITE Hush foam insert is an effective mechanical media that removes debris from the aquarium and encourages populations of beneficial bacteria that are important in maintaining the proper biological balance in the aquarium. Everything you need for your pets. Top name brands. Wide selection of Dog, Cat, Bird, Fish, Rabbit, Hamster, Small Animal, Snake, Lizard and Reptile supplies. Quality pet products at discounted prices! Be sure to add me to your favorites list!