Some people I know with softeners have had their resin blow up, explode, whatever, and it's supposedly due to the higher (3ppm) of chlorine we have in our water supply. Due to our hardness at 15 gpg, we're think of getting a Fleck 5600 softener and it makes sense to have a charcoal filter before the softener to remove the chlorine so our resins doesn't explode as well. Now I hear another viewpoint: put the the filter afterward..supposedly the Big Blue will capture runaway resin before it gets in the plumbing and we'll have the benefit of chlorine in the softener to kill off bacteria. Thoughts on where the filter should be, please.