Could someone show me an example how an aerator head looks like with flagstone coping and waterline tile?

I am thinking about adding an aerator head to my pool but I just don't know where it would fit and how it would look like.

The builder is trying to charge $350 for 3 spray heads which I think is excessive considering all it takes is a jandy valve and a 3/4" run from the pump to the edge of the pool and a $5 aerator fitting.