The PHOSPAT has been developed to reduce the phosphate concentration under 0.035 mg/l in ponds, natural pools, spring and circuit fountains. Below this value, due to the lacking of food, the algae will not survive. Equipped with an appropriate installation, a single filter cartridge can be used to handle up to 600m³ of water. The maximum capacity of PHOSPAT can be adjusted by tuning the right amount of the phosphate binding media and thus enabling optimum treatment of the desired volume of water. The granular binding media Phoslamin has been designed with the aim of binding phosphate and it is filled into the PHOSPAT cartridges by the so-called 3-layer bed. The two outer layers protect and fix the Phoslamin layer. At the same time, they provide a uniform flow through the cartridge. Due to its unique composition, the phosphate is fixed irreversibly and within a short contact time.