We are getting a pool built in the Houston area and are concerned that the water temperature will get too high in the dog days of summer. What is the normal water temperature people are seeing during the 90+ days? I don't think I would enjoy swimming in water that warm. Does anyone in the Houston area have experience with the Glacier Pool Cooler, http://www.glacierpoolcoolers.com/residential.htm? Does it only work well in low humidity climates?