Solar covers really do make a difference. Especially if you use a solar heater to pick up heat during the day, having a solar cover will keep the heat in during the night. Without it, you end up losing most of the heat you gained during the day. Mine got torn up mid-summer last year and we didn't fool with a replacement for the rest of the summer. It reminded me how effective it was. Hope to get a new one for this year.

Watermom