Does the color of a pool affect the temperature?

Answer 1

A darker pool liner will absorb more energy from the sun and release it into the water, making it slightly warmer. Lighter colors won't have that effect. The warming isn't really significant enough though to justify getting an ugly liner because it's dark, using a solar cover will be more effective. Keeping the solar cover on overnight will help the water retain heat as well.

Answer 2

A white pool had the least amount of evaporation each time the experiment was conducted. In experiment 1 the difference between the water loss of the white pools and the other pools was small while in experiment 7, the difference was comparatively large. I cannot account for the size of these variances. Perhaps the colour of the pool had an impact on this, but I cannot be sure. I had expected that the dark blue pool would have the largest evaporation as it was the darkest colour. This was not supported by the results of my experiments. In some experiments the dark blue poolslost less water than the other coloured pools. On average however the coloured pools showed little difference in the amount of water loss and the white bowls showed less water loss.