Allergic to chlorine, so we started our pool with Baccacile (sp?). Anyway, about $500 for the season on that. Changed to the saltwater system this year. It is a bit of a cash layout to start up, but I think we maybe hit $100 on chemicals this last summer. We vaccuumed the pool once a week and checked the chemical levels at the same time. We had kids (anywhere from just my 3 to 6 or so at a time) swimming in it everyday. I like how "soft" the water feels.