Haha.... Can't seem to get the bridge to work. Tried, but not stable enough. I rearranged again. I like this arrangement. There's a lot more space between the rocks for flow and for the eel to get through. I have about 50 more lbs of rock in my other tank, but think ill leave it there. It'll need some too keeping some biological life in it. I'm hoping this time tomorrow it will be up and running. Still haven't tested the return pump, but it's ready for turn on once there's enough water in the sump. Almost there!