I think using a return aerator is a bothersome way to effect aeration. Especially in colder weather, you'll be having lots of fun reaching into that frigid water.
My suggestion is to head over to Harbor Freight or a big box home improvement store and spend $45-$60 on an immersible sump pump. You can set it on any steps going into your pool or drop it to the bottom in the shallow end and plug it into a wall socket. It'll move enormous amounts of water and produce plenty of bubbles. The only additional thing you would need would be a few PVC pipe fittings to screw into the pump's output to point the water spray in whatever direction you want. You'll be able to lift it out of the water when your done without getting wet and it's also useful if you have to drain your pool below your pump intake or if your pump dies someday and you need a temporary way to circulate water.