Very cool video. I notice that the vast majority of fish movements are along the viewing windows. This makes me wonder if there is really much gained by having a large space between the rocks and back wall. I know the flow is valuable and I would not sacrifice all of it. But it does bring up an interesting trade-off... moving the rocks back a bit would provide more swimming space in the areas the fish spend most of their time.
Don't get me wrong, I'm not criticizing... just noticing a pattern and thinking out loud. This could be very useful for those planning their rock-scaping, etc. I know for me it has been very helpful to watch this short video. So thank you!
