I've been dealing with "water treatment" systems for almost 20 years.. I've seen literally 200+ different setups that use everything from simple carbon filtration, distillation, UV treatment, and (my opinion) worst of all RO. There is a reason why RO systems CANNOT have copper piping after the system.. Without PH balancing, it is acidic, and will erode the piping. Those who have gastrointestinal issues, or hiatal hernia (me..), will suffer from heartburn and reflux just by drinking it. I absolutely despise the so-called water treatment companies that sell these systems without properly informing their customers of possible side effects. Culligan is one of the WORST. Selling water softeners and not mentioning that without changing the water heater anode rod, you'll have smelly hot water. Then, when the customer puts 2&2 together, they still can't takecare of the problem. If you want your water taken care of, call the plumber, not the saleman who doesn't know crap about plumbing. Sorry, rant over...