Carbon, also called activated charcoal, is an excellent filtering material. It is basically charred wood or some other natural substance. The shape of the carbon molecule causes it to attract a few lighter minerals and most toxic chemicals. At the same time, it seems to be quite harmless and does not add many toxins to the water it touches.
For best results, the carbon must touch the water for a prolonged period of time. This means that the larger the carbon filter, and the slower the water flows through it, the better.
Types of carbon filters. Carbon filters comes in two main types. The less costly type is simply powdered charcoal or carbon. A better type is called a carbon block filter. The carbon has been compressed to form a more dense block. The compressed carbon removes more impurities.
Advantages of carbon filtration of water.
Carbon is fairly non-toxic, inexpensive and will remove quite a few toxic chemicals and chlorine gas and other gases to some degree. Also, and most important, carbon will not damage the water at all. It is a very natural type of water filtration system.
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