I use EcoOne (just the once a month product) along with Synergy system (for spas) for my Sanitizer, after balancing my Alkalinity and pH. It helps keep the pH in check, the water smells fresh, I maintain a low chlorine reading, and don't get any "itchies".
My skin is sensitive to unbalanced water from doing a zillion water tests at our store, so I always need my water in check.
Hope that helps