Gary. Just visited your site, and was looking at the calculations for a water softener. I dont quite understand how to use this. I did the water sf rating test, and the most that I can get from a bathtub is 5 gpm. Anyway, as of now, it's just me living in my home, but I would like to size for my home to cover future expansion. I have 2 full baths, 3 bedrooms, automatic washer, dishwasher, and disposer. I have not had a recent test done as of yet to calculate hardness, and am just trying to get a ballpark figure of what I can expect. I will have a full water test done prior to purchasing any equipment. I do know from past tests that the calcium and mineral levels (limestone, and minor iron) are high. Also, which would you recommend..Clack, or Fleck? I am on a private well and septic system, if this makes any diff, however I will not be discharging backwash into my septic system.