Can you put a solar cover on bubbles down?

Down, if you hope to heat your pool with it the bubbles (in theory) will heat up from the flat side. As there is more surface area from the bubbled side more heat (energy) will transfer to the water. I've never read any studies myself but I've read differing opinions from people in other posts. Some state the the solar cover actually blocks the sun and less heat is transfered on sunny days and that it is more beneficial to use take the cover off. Personally I find that if you leave the cover on when not using the pool, except when it's raining, the temperature stays the highest. Ensuring the cover is clean and there is no standing water on top of the cover really helps.