Husband has heard tell of a new (just released in the last year or so) water softening technique that does not require any kind of salt (nor potassium or other salt product) to do its thing. It sounds a bit on the edge, but as far as he can tell, it is chemically sound (he is a chemist by training.) However, it's enough on the edge that he'd like some info from someone other than a salesperson.
Do any of my home construction fans here know anything about this?
Thanks in advance!