We are in the process of building an in-ground pool (16 x 34) and spa (8x7) and chose a Jandy chlorine system w/ Paramount UV Sanitizer after being scared off of saltwater by multiple builders during the bid process. Now I'm reading the UV system is useless and I'm debating paying to upgrade to a salt system instead. Please talk me out of this or confirm our desire to go w/ salt! We have MX travertine coping in platinum ice and stacked stone veneer on the spa, a raised glass tile wall and waterline tile in the pool, and salted concrete decking. Is it true that we can't use the salt system when the water gets below 60 degrees? What are the pros/cons... Thank you so much!!