How is it possible? I haven't really touched the pool all winter. Sure I scooped out the leaves and stuff a couple of times, but that's really about it. I've been added chlorine for a couple of weeks now so tonight I figured I'd check it out to see which way it needed to go. It was perfect. The chlorine was just a touch high but that's good cuz it might rain just a little more. All the rest of the levels were perfect. Now I it needs is a good sweeping and a little heat. I think it's about 65 degrees right now. Anyway, hopefully we'll be swimmin away in the next month or so. Keep you fingers crossed.