One of the things in posting about slugs you learn a lot about slugs. People send you little snippets of information and when you put it all together it is really quite interesting.
Aluminum Nitrate is another type of salt that kills slugs, but does not destroy your garden. As I wandered my garden in the twilight of the evening searching out survivors I noticed all the lovely (?) brown spots in the areas where I not only killed the slug, but killed the plant…..