Electronical placement is heading in the right direction.  Cutting down the tub got more water into the air.

The tub could go all the way back, with all the electronicals vertical.  It's stable enough to not need ballast.

Getting the spray to go in the air instead of on the table proved to be a big problem.  Most of the water ends up going down.  Air currents around the stand blow down.  The stand creates more of a vortex than the tripod.  Ideally, air would flow under the transducers or the transducers would stick out more.  

Aiming it perpendicular to the airflow gets a little more into the air.

A useful feature would be selecting how many transducers to run.  The software for turning off would then be useful.