This product is highly effective and is entirely composed of plant-based materials. It absorbs toxic and harmful substances, as well as dirt particles quickly and efficiently from both freshwater and saltwater aquariums. The steam-activated carbon is in granular form with extremely fine pores. 1 gram equates to an internal surface area of over 900 m². The activated carbon should be removed from the aquarium before administering any medication. It is recommended to place the filter material in a mesh filter bag for ease of use.