I was also curious about the aeration and saw this ....
"Aerator- The easiest way to cool your water off is to use an aerator. An aerator is an attachment that plugs or screws into the side of your pool that sprays a fountain of water being back into your pool. Oxygen is then introduced to the small droplets of water that are sprayed through the air and when it lands back into the pool, it helps bring the pool temperature down a few degrees.
For example, if your pool temperature was about 94 degrees, you may expect your temperature to be around 90 degrees with your aerator on.
To turn on your aerator, your pool equipment should have a valve that needs to be opened. There is no specific valve for turning on an aerator, but most pools have their valves labeled to help you figure out what each valve controls. If you cannot figure out which valve controls your aerator water flow, take a picture of your equipment and show a local Leslie’s professional."