Rob we have the same problem here and there is a company in town that specializes with purification of hard water name Schaefer Water Center. You can contact them or click the link below to find someone near you that can help you out.
Missouri Water Systems But I would recommend a reverse osmosis water treatment system that will distill your water and you just change out a filter once in a while. Its a neat setup and the water will have a zero conductivity and no impurities. My two cents, Mark