Is this a durso style, with 2 pipes in the weir?
I'm running an aqueon 75 rr that has the big tower weir on the back panel, just offset to the left. It's a durso, one 1" pipe to drain, and one 3/4" pipe for the return. I wanted more flow on my return, so I have both pipes setup as a Herbie style overflow. My return in s 1" that runs behind the tank and over the back glass. Not pretty, but it works.
I would rather have the same thing, but an additional drain pipe to act as a safety, in case one of the 2 drains get clogged. That would be a bean animal setup.
Here's diagrams and explanations on the 3 systems: