3 Things to Know About Solar Cover Bubble Direction

Bubble direction makes little practical difference The conventional wisdom says bubbles down for insulation and bubbles up for debris, but the actual effect is too small to notice.

Bubbles down slightly improves heat retention Trapping a thin layer of air against the water helps keep heat in, which is why most covers are designed for this orientation.

Bubbles up collects debris but works fine The dimples catch leaves and dirt, though they might reflect a bit more sunlight into the pool. If you already have it that way, don’t bother flipping it.