Chris,
This website sells the Fleck 7000 and offers SST-60 resin and was the basis for my price comment:
http://www.ohiopurewaterco.com/shop/customer/home.php?cat=632
As to a prefilter--unless you get significant amounts of sand or your water is visibly dirty I don't recommend a prefilter. The reason is that it is not really necessary--the regular regeneration process of the softener clears small amounts of dirt just fine--and human nature is to forget to maintain such filters and that can cause significant problems if the filter loads up and reduces flow--it can cause the backwash of the softener to be inadequate because of low water pressure and that can cause the resin to fail with replacement of the resin as the only alternative.
This website sells the Fleck 7000 and offers SST-60 resin and was the basis for my price comment:
http://www.ohiopurewaterco.com/shop/customer/home.php?cat=632
As to a prefilter--unless you get significant amounts of sand or your water is visibly dirty I don't recommend a prefilter. The reason is that it is not really necessary--the regular regeneration process of the softener clears small amounts of dirt just fine--and human nature is to forget to maintain such filters and that can cause significant problems if the filter loads up and reduces flow--it can cause the backwash of the softener to be inadequate because of low water pressure and that can cause the resin to fail with replacement of the resin as the only alternative.