Definition: Activated carbon is a filtering medium prepared by exposing organic shells to high temperatures and steam. The resulting highly porous material absorbs dissolved organic compounds and large ions, such as iodide, as well as odors from aquarium water.
activated carbon
By Shirlie Sharpe, About.com
Suggested Reading
Explore Freshwater Aquariums
Must Reads
About.com Special Features
Home Allergy Center
Banish mess, reduce allergens, and maintain a clean, healthy home. More >
Home Improvements Made Easy
Inspirational ideas and expert tips to help you pull off your next DIY project. More >
©2009 About.com, a part of The New York Times Company.
All rights reserved.