CARBOLIT complex filter cartridge. Carbolit is a high-quality, complex filter cartridge that was created by combining 1: 1 active coconut carbon and zeolite. Activated carbon obtained from coconut shells is the most efficient filtration substrate among activated carbons. It effectively removes substances that cause water color and its smell, as well as chlorine and many toxic organic compounds, as well as some heavy metal ions. The action of coconut coal is complemented by a natural, porous mineral from the zeolite group, which removes ammonium (NH4 +), some heavy metal ions and organochlorine compounds from the water. The combination of two such excellent filter materials allows you to get crystal clear water in the aquarium. Carbolit is perfect for aquariums after the end of therapeutic treatment.