interestingYes, to the third question and that answers the other two. It's also easier to find and less expensive. The cost difference isn't exactly enough to put me in ruins but it matters when it's something you use a lot of.
I love me some salt...might try some kosher flake salt
I actually put a dash of the himalayan salt in all of my drinking water...electrolytes and minerals and shit...plus it tastes good to me