Home water softeners using sodium replacement are not ideal I don’t think.
Ion exchange units for human consumption aren’t much better.
Either of these will leave you with unbalanced water and in both cases you need to add some powder so;
If you’re going to do it.....RO
and maybe DI
with replacement minerals is ok.
This will give you a clean slate of 0 TDS
water which is then reconstituted with gh
minerals etc. to suit your requirement.