wrote:

not to mention is very expensive to use soft water. �

What do you call "very expensive"?

A 40 pound bag of salt will typically produce about 6,000 gallons of
softened water... a 40 pound bag of salt costs about $4.50.

Actually that same $4.50 worth of salt can save the average household
about $45 worth of cleaning products each month... not to mention the
time and effort of cleaning, and will save more than 6,000 gallons of
water each month (mostly hot water) because softened water is just
that much more efficient at cleaning. Softened water is kind to your
plumbing too, will save untold thousands in plumbing bills over the
life of the water softener (about 20 years).

If one lives in a hard water locale *not* having a water softener is
VERY expensive.