Then don't design anything complex. Just attach a single sweeper nozzle to the end of the 1" line and wire it to a metal fishing pole holder so that it's oriented exactly parallel to the surface, but about half an inch under. This will create a significant disturbance at 60 psi. It will also create lots of circulation depending on where you put it in the pond, and how large the opening on the sweeper nozzle is. The standard sizes you find at Home Depot deliver either about 5 gpm or 12 gpm. Buy one of each and see which you like.

This makes a fabulous back up aeration system for a smaller pond such as yours. It will also deliver fresh water. You'll need to estimate an electrical and water budget so that you get the most circulation for the dollar spent. If it gets expensive you can find ways to just run it at night.

Holding a redear sunfish is like running with scissors.