This is a pic of the tank before I finished the closed loop. I reconfigured the lower returns before I added sand and I don't think I ever took pics of the way it is now.
This shows more than one return on each side, which was taken out and I went with just the one return in each bottom corner and the two upper corners. I also did away with the LocLine when I figured out how to conceal the bottom returns.
I used black pvc against the black background, so you really have to look close to see the pipe running down the back wall, alongside of the overflow.
This is how I plumbed the 4Way valve.
This is how the tank is plumbed at the top from the 4Way.
This is the tank a couple of months ago. The arch hides the big honkin closed loop return screen.
As far as pumps go, I am probably not the one to ask. I have a Dart on mine, they are known power hogs - but, it has given me great reliability and performance. That pump would be too much for your tank though. Maybe look at an Eheim. Pricey, but another very reliable pump.
