Continuum Aquatics 500-gm. Labyrinth Carbon
All carbon is not created equal! It is all black, but that is where the similarity ends. Reef•Basis Labyrinth Carbon is a supreme quality, pelletized, steam activated filtration medium particularly selected for sensitive aquarium environments. Labyrinth is bituminous coal based exhibiting huge volumes of mezopores and macropores and suited to adsorption of a wide range of organic pollutants with minimal impact on trace minerals and pH. Labyrinth will remove stains, dissolved organics and toxic gases in marine, brackish and freshwater systems. It has a very high adsorption capability with an iodine number in excess of 1,000 and a molasses number in excess of 600, with immeasurable phosphates and almost no ash content.
Reef•Basis Labyrinth Carbon is much more active and effective than most competing carbons, so you can use less and still get excellent results. Many hobbyists prefer to keep activated carbon in their system all of the time and others prefer to use it intermittently, as needed to control color and cloudiness. Labyrinth works fine in either case, but Continuum recommends the latter method if the aquarium has excellent mechanical and biological filtration (In marine systems this would include a good protein skimmer). In this case, use it two or three days a week or as needed. Always properly dispose of used carbon in an ecologically responsible manner.