The wavebox is not intended to be used on it's own. So the basic requirement would be 1 6100 and a wavebox. The wavebox flow has no direction to it, it is just a rocking motion that lifts and suspends debris, but directional flow is needed to sweep away detritus. All of the above would be the ideal set up, but 1 6100 and a wavebox would also work, as would 2 6100's, but a wavebox alone is not a very good set up.