Replacement filters for Alkanatur Alkanatur Alkaline Water Jug. Alkamicronized selective® technology allows us to filter for 400 liters (1 filter) water free of chlorine, fluorine, pesticides, nitrates, heavy metals (lead, mercury, cadmium, copper, aluminum and arsenic) and trihalomethanes up to 99%. It provides antioxidants and hydrogen through its cutting-edge technology. It does not reproduce the dreaded bacteria Escherichia coli, Pseudomonas aeruginosa, Clostridium perfringens and coliform bacteria. We certify that our filters meet the highest European quality standards and under Royal Decree 140/2003 that establish the sanitary criteria for the quality of water for human consumption. Our charcoal is made from coconut shell and is thermally activated in a reducing atmosphere, saturated with water vapor. This gives this coal three fundamental qualities to be used for water purification: The raw material is of vegetable origin and for