Soft(r) salt?

[waterbear]

I've never heard of solar salt. What else is it used for and where do you buy it(what type of store)? Cost per bag?
Hal

It is water softener salt that is not in pellet or block form but in crystal form and is NOT rock salt, which it too impure to use in a SWG. It will say solar salt on the bag. Both Morton and Diamond Crystal have solar salt. The Diamond Crystal comes in a blue bag. They also have 'Sun Gems' which is a larger crystal solar salt in a yellow bag. I pay about 4 dollars and change for a 40 lb bag (the 80 lb bag is cheaper by pound but hard to lift). You can buy it at hardware stores, grocery stores, Home Depot, Lowes, etc.