I did this recently and everybody likes the feel. I didn't tell anybody before I did it and the kids & wife noticed the difference imediately and asked about why the water felt different. It feels nicer/softer on the skin and is nicer on the eyes. You already have some salt in your pool but you can always add more. Most SWG's need around 3000 ppm in order to generate enough chlorine. I didn't go that high and decied to start with just a little and see how it went. Since all I wanted was the nicer feel I didn't need to go that high. Salt water in the ocean is much higher, about 35,000 ppm .

I have an inground gunite pool/pebble finish. I would worry about an above ground pool though as you have metal and more salt means quicker corrosion. Any water is going to corrode metal, add salt and it will do it quicker.

-- john