Z,
Another reason to go with a SWCG is that you can test to see if it is working or not. Not so much with Ozone..
A SWCG is the real deal.. it uses the salt in the pool water to make chlorine.. Ozone is mostly just "magic"..
One sanitizes your pool water, and the other just makes you "think" is it doing something..... All magic.. but no rabbit..
Thanks,
Jim R.