My AGP gets uncomfortably hot in July/August here in North Carolina. I want to use PVC pipe to create a sprayer/fountain to lower the pool temperature but I only want to run it for a few hours in the middle of the night. I do not have pool automation. I was thinking about teeing off of my return line into an actuated valve ( maybe a sprinkler valve) connected to some type of timer. Has anyone done anything like this, or have any suggestions?