I have been looking online for information on hard water treatment but most links are attached to a product being sold so I am asking for some first hand experience. Our water is moderately hard but enough to cause a film on shower door and combine with soap to clog the drain. Our plumber is trying to sell us a Flow-Tech system to descale that does not use salt. His solution combines that with a whole house filter. The Flow-Tech uses a low frequency pulse, not magnets like other systems. Anyone have any experiences or reccomendations?