Well, I installed the pool coolers tonight, and I must say so far so good. My water was 91 degrees tonight, and we have nothing but 95 degree days with heat indexes of 100+ ahead. As soon as I installed them and turned my pump back on, I jumped in to see what it would do. It was amazing. The water coming out of the device was about 10 degrees cooler than the pool water. You can stick your hand in the water, then immediately put it in the water being sprayed, and it is day and night difference. I left them in and running tonight and put my Aquabot in. I also had to shock as I have some algae developing. So there is a lot of stuff going on in my pool right now. I will post back and let you know the results, hopefully getting to below 85.