I have a spillover spa that currently is always in spillover mode unless the spa is on. I'm wondering as cooler weather approaches sometime in October (for us in south La.) if I should shut the spillover off, cover the spa and keep it filtered and heated separately from the pool. Right now to heat the spa takes less than 10 minutes, but my water in both the spa and pool have yet to get below 80. I may try to keep the pool at about 85 with my heat pump and solar cover for the next month or so (or until I see the electric bill). Still would like to keep the spa going all winter but not sure if it's worthwhile to cover and keep hot or just heat up when needed.