Top Fin Ef-S Element Filter Cartridge Value Pack 12 Month Supply 2.1 In X 3.7 In (2 Pack)

Keep the water in your aquarium clean and safe for your fish with this value pack of Top Fin EF-S Element Filter Cartridges. The cartridges in this 12-month supply feature activated carbons and have proven highly effective in removing waste odors and more from your aquarium water.