After asking poseidon about his home-made aerator, I made this one over the weekend-
I used an adapter threaded into my 1.5" return, then a short section of 1.5" PVC, a 45* elbow, a longer section of 1.5", a 90* elbow, another short section of 1.5" and a 1.5" cap. I drilled four 7/16" holes in the cap, spaced evenly apart. All pieces are held together by friction, I didn't even have to use glue. This will let me change the direction of the flow later out into the pool if I want to use it as an evaporator, perhaps with a different cap with lot's of smaller holes to enhance temperature exchange.
It really churns up the water-
I have a short video clip of it in action, but can't seem to get it off my phone right now. I'll add it later if I'm able to.
Not much money involved, and seems to do a good job.