My water supply is an on-site private well, so no chlorine issue. Now, I believe (but don't know for certain), that water softeners do not affect chlorine. I would think that the process of making RO
water, mixing and storing would take care of any chlorine though. Sorry, can't answer the calcium reactor question although it seems as though the removal of calcium ions would have some effect that's unknown to me. I'm going to opt for an Ebay RO
unit as a $90 "insurance" policy that also produces pristine drinking water. Make sure to use less laundry soap the first few loads with softened water!