The Exo-Terra Carbon Pads for the FX200 Filter are specially designed replacement pads that enhance the filtration efficiency of the Exo-Terra FX200 external canister filter. These pads are infused with activated carbon, which is highly effective in removing impurities, discolouration, and odors from aquarium water, ensuring a cleaner and healthier environment for aquatic life. Easy to install and replace, these carbon pads are essential for maintaining optimal water quality in terrariums and aquariums.