Here's some important info about swapping over to KCL (potassium chloride, salt substitute) from NaCL (sodium chloride, softener salt).
It's from North American Salt, North America's largest salt supplier was it?. Justalurker sent it to me in Aug 2005. I was able to recover it from a damaged MS Outlook archive today. I've been meaning to do that for over a year. I'm glad I was able to do it because I found
all our email too. Very interesting reading!! I can now prove that my recollection that justalurker programmed his softener incorrectly, even after I corrected him! is correct.
CAUTION: Many people taking the advice that you can simply swap NaCL with KCL with no problems will cause their softener to have problems. And if they are not DIYers, they will have to call a local dealer and probably pay for an expensive service call to make it right.