In recent years the global degradation of air and water has become more demanding, requiring today an increasingly efficient treatment with activated carbon. By choosing Carbolite activated carbon, we guarantee the highest adsorption efficiency, one of the essential keys to the efficient purification of water. The physico-technical specifications of this activated carbon clearly demonstrate the difference in quality compared to most active carbons on the market. The adsorption surface in m2/g of a quality active carbon must be large and its negative ionic charge rate sufficient for the exchange of toxic ions takes place with reference to the Van der Waals effect. It is important to change the activated carbon regularly before saturation so that organic matter, heavy metals and chemical residues continue to be neutralized as much as possible. The criterion weight of activated carbon grains 1-3 mm per liter is very important as well: the lighter it is, the higher its adsorption efficiency is high because its micro-porosity is much denser. Which is not the case with the zeolitic rock crystal!