Thank You,

My knowledge of chemistry is almost non existent so your response is exactly the type of info I was looking for. I installed the water softener last night because I was confident it would reduce iron in my non-chlorinated well water when refilling. It's also plumbed so I can switch a few valves and circulate chlorinated pool water thru it and if the cost the chemical you describe is reasonable I will probably give it a try. Thanks for pointing me in the right direction!

That leads to another question.....Can I simply replace the common salt in the brine tank with sodium hydrosulfite and get effective resin regeneration on both chlorinated and non chlorinated water? If not I can easily rig up a special tank.

Thanks again!