The Fluval A83 is the correct replacement cartridges for the following:
The A83 - Elite Carbon Cartridge for A80 - 5-pack is a five pack of replacement aquarium filters for the Elite Hush 35 Power Filter. This Elite aquarium filter provides pre-filtration polish to your aquarium water and utilizes activated carbon to remove discoloration and odors. This Elite Carbon filter should be replaced every month.
A83 - Elite Carbon Cartridge for A80 - 5-pack specifications: