Is there a viable way to heat my below ground pool using solar energy? I know I've read about solar water heaters that heat the water in pipes which then send it to a holding tank. Could this be done for a pool? Or could solar panels power a small heater for the pool?

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I've been thinking of either painting the concrete walls and floor of my inground pool a dark color or having dark tiles put in for a different look. I really like the pools where the water looks dark as opposed to the typical blue or white. I was also wondering if the dark walls and bottom of the pool would help heat the water since darker colors absorb the sunlight and heat as opposed to reflecting it with lighter colors?