4 Things to Know About Solar Pool Covers

Bubble covers trap heat and cut evaporation by 90% or more. They float directly on the water surface, which is key to their effectiveness.

Automatic safety covers do not insulate as well as bubble covers. They sit above the water with a gap, so they are better for safety than for heat retention.

Solid winter covers are useless for controlling evaporation. They are designed for debris and winter storage, not for keeping heat in or water from evaporating.

A 12-mil blue bubble cover is all you need. Thicker covers last longer but are harder to roll up. Do not overthink the choice.