Oh I would never, ever swim *under* a pool cover!!!
After all the fantasies of continuing to swim, however, I decided it was just too much work - between errant weather, winds, premature falling of leaves etc. it ultimately didn't seem that a handful of swims would offer a big enough payout.
Solid, dark covers do indeed provide a solar effect, even without the penetration of direct sun. That's one of the benefits of automatic pool covers. If covered when the water is still very warm, they prevent evaporation thus prevent the cooling of the water. In addition, the dark cover absorbs heat from the sun and warms the water. All in all, it's about a 5-8 degree surge (upward, that is).![]()
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