What water quality do I need?

One of the water additives which provides good spray quality is Finalsan. It is however problematic if the water used is hard, as insoluble substances are created which clog the filters. It is a good practice to use water with low hardness, or water hardness reducing additives. The availability of such additives depends on the country and local regulations. In worst case when no other solution can be found, destilled water can be used, this is however usually not prefferd due to the price.