Hi All, I realize it's an age old debate….but I'm losing sleep over what to do. I am putting in a rectangular gunite, blue stone coping 13x38 with built-in spa. It will have a built in retractable cover. I have 3 dogs who will be using the pool, and I'm concerned about the 'feel' and clarity of the water. Should I splurge for an ozonator to go with the chlorine system? Should I be doing salt? But I'm worried about corrosion. HELP ME!