as to the salt thing, in the 70's we use to take salt tablets to go with a gallon or so of water leaking out. I remember my pants being white from the salt leaching out.
an old friend of mine who probably by hand did about 300 bags of concrete in his back yard, would drink ice water with a teaspoon of salt in it to keep in from all being leached out. it can be a life endangering situation.
