I am just finishing up switching my baqua pool to chlorine, so we're throwing out our old solar cover and starting fresh.
In the meantime, I bought an item called a "Solar Pill," It's a little ball that floats in the skimmer and slowly releases a chemical that will help in holding the water temperature. I used one a few years back in conjunction with my solar cover to help maintain the temperature during the day.. and it seemed to do a decent job. We're going to try using it for a few weeks before deciding if we want to get a new solar cover.
I'm wondering if there are any chemicals out there similar to the stuff that's in the Solar Pill?