We have a lot of iron in our well water (5.5 parts per million). We've never had a water softener before and don't know which one is best. We're going for the salt system. Kinetico or Culligan? Do we need a company like Culligan or is it adequate to go purchase one at Sears or Home Depot and do it ourselves? We realize Kinetico doesn't need electricity. Both say they use less salt than the other. We've had both representatives over to the house to analyze our water, recommend a system and explain how their system works. Culligan is about $800 cheaper than Kinetico. Any feedback we can get would be welcome. Thanks!