The Elite Biofoam A905 is the correct replacement for the following:
The Elite Biofoam Replacement Sponges effectively traps dirt and debris in your aquarium water. Also known as part number A905, this 2-pack water pump foam filter should be rinsed every 10 to 14 days and replaced as necessary for optimum performance. Designed to fit the Elite Biofoam Filter these foam sponges perform biological and mechanical filtration.
Elite Biofoam A905 Sponge Replacement Specifications:
These replacement foam sponges trap floating debris and support the growth of beneficial bacteria on their porous surfaces. Be sure to rinse your foam filters in water that is taken from your aquarium and only replace one of the foam portions at a time. To maintain the proper biological balance in your aquarium, alternately replace the foam sponges when necessary.