They can be cleaned by abrading the media. Carbon filter elements may take either block or granular form. They both act like a magnet for various chemicals, tastes, odors, bacteria and viruses, which stick to the carbon surface through a process called adsorption. Carbon produces water with a clean taste and smell, although it does not remove dissolved minerals such as salt. The drawback is that when the limit of adsorption for a particular material has been reached and the surfaces of the pores are filled, the filter no longer removes that material, and previously adsorbed organisms and chemicals can be released into the drinking water.
Carbon also has a limited shelf life after first use.
Therefore, regular replacement of carbon filters is recommended, whether clogged or not. Both elements are combined in a manner to allow a relatively fast flow of water. Glass fiber and iodinated resin with carbon -see Purification. Filters are more expensive than other methods, but they are also more reliable and often faster and more convenient. Choose a Filter 4.