I've been thinking (always a dangerous thing). I have heard people with solar panels can run them at night to provide some cooling for the pool water. What if you have solar panels set up in a heavily shaded area and run them night or day? Would that create a cooling effect? I have tried the fountain but it doesn't provide much of a drop unless you are standing under it.
Our water gets up to 90 or more in the summer and a chiller is cost prohibitive at this time.