You can cut back significantly on pump runtime and maintenance in the colder months. I test and dose my pool just once a week in the winter. I could get by with just a few hours of filtering a day, maybe less. I've never done a close, but testing FC and pH a dozen times throughout the winter seems like significantly less work than closing and opening a pool. Plus, I still get a lot of enjoyment from my pool during off-season. I like to look at the water, and wouldn't ever consider covering it up or draining it down a few feet. I enjoy my pool year-round!