D.W.
We have an inground pool with a vinyl liner. We use chlorine. We do not have any problems. I personally prefer chlorine. Our pool is very easy to maintain.
I would recommend finding a professional pool installer. We have a few pool supply stores here in town and most of the people who work there are not professional pool people. They only know what they've been trained to say. Half the time they can't even find us the parts we want, we have to find them in the catalog! So when we have questions, we call the company that installed our liner.