Big D....since you have both Ozone and Salt it's hard to brag about one over the other. I've been a SWG user for several years now and haven't had to shock either, except upon opening. My pool water was also dark green when I opened and in 24 hrs was crystal clear as well.

A friend of mine has a UV Ozone system and loves it and doesn't have to shock either. The only thing he dislikes is trying to keep his chlorine residual stable. I don't recommend ozone when you still have to have chlorine, when you can have a SWG and not have to have ozone.