KCl Water softener

[jsoong]

Adding KCL won't soften your water. Your water softener removes Ca & Mg from the water & exchanges that for K. This is not the same as adding K to the water.

<It needs to do the exchange because it is only removing Ca/Mg & not HCO3, so need to add the K to maintain electrical neutrality. The other option of softening water is to remove both the Ca/Mg AND HCO3. In that case no KCl or other salt is needed - these would be reverse osmosis units.>

FAIK, adding KCl is only limited by the Cl added. Since Cl is the determinant of salinity, too much is not good in a FW system.