There's a pool service guy in Texas, with a blog here:
http://thepoolbiz.blogspot.com/
that has info you may want to look it.
He pretty much foams at the mouth, on mention of salt water systems, but he has collected some interesting data. A lot of what he has seems to apply to areas that have lots of evaporation and not much rain in the summer. He seems to assume that the problems he sees in Dallas are the same elsewhere.
As best I can determine, some of the problems he describes are
(a) real, but
(b) limited to pools that experience little summer rain, and
(c) that have natural stone decks or coping, and
(d) that have owners that do NOT rinse down the decks with fresh water every couple of weeks.
So, that doesn't apply to everyone, but it may well apply to you.
Bookmarks