Shorty that is a great idea !!! \:\) You could even put a T to a small 1/2in line with a pressure regulator to an underwater horz. aeration outlet so that the size of the cold/warm spot was bigger. Inject 5 gal. per min out of a total of 6 nozzles in different directions in the horz. plane at the main pipe depth of cold (warm in winter) aerated water and you would always have a sweet spot thermal refuge.