Yes, ours is salt. My PB said if we did salt, he would seal my stonework... which he did. My brother-in-law has had a sw pool for over 10 years, moss rock & flagstone and hasn't had any problems so far. I'm not too worried about it myself. BUT, I know some people have issues, but I don't know what the percentage is. There are different types of flagstone where some are much harder than others. I would do salt again if given the chance.
We love the salt pool. All we do is add muratic acid maybe twice a week. These winter months we add bleach every now and then, because the sw generator shuts off when it gets cold. The pH rises and the acid puts it back in check. The best part it is sparkly clear!
From what I read on here, the ozone system is not necessary unless you have an inside or covered pool. I suppose because you get ozone from the sun...? Don't know that answer. You could find people that could answer that better on here.
