So i watched an underwater vertex membrane video and i do have to say i dont think there was much difference in air streams. I was not upclose to the vertex like i was on mine in the pool, but they looked very similar. I think sure the vertex might produce a smaller bubble but i wont be able to tell that with my experience or vision. I did watch the four disc vertex in a pond video and it seems to move move water outward but i assume that is because it is a four disc. I think adding one more in my deep end should be all that i need. My pond is pretty small.
