In some areas a separate phosphorus filter is required in addition to the subsoil processing system. Labko Fosfori 1000 Phosphorus Filter is installed to follow the subsoil processing system. From the collector well of the subsoil processing system the water flows further into the Phosphorus Filter, and from there e.g. into an open ditch. The purification efficiency of the filter is based on the replaceable phosphorus mass in the tank.
