Yes, I think you found how to twist them (each side) pointing more up or down. I vary the flow between the plus & minus mostly the 10 or 20. It does take a bit of experimenting with how to set it. I would turn your a bit more toward the surface so it doesn’t hit the bottom so hard. Again I’m no expert just speaking from my own experience and no help from anyone. I’ll see if I have a video that will upload.I have one gyre, and the stock return pump (not the mighty one). I have my gyre on 10% in that video and it looks like a ton of flow