Hello Everyone, My name is Jesse, I am finally getting back into the hobby after a two year hiatus. So I recently picked up a used 160 gallon tank. It turns out that the guy that had it before me drilled three holes into the bottom of the tank. Why? I have no clue. But my dilemma is that I am trying to figure out how to utilize and build an overflow for my sump underneath. I have been wracking my brain for the last month on what to do, but sadly I am still drawing a blank. If anyone has any ideas of the best way to go about using the existing holes that have been drilled into the bottom of the tank that would great. I am attaching photos so that you can see the holes and what I am working with. Thanks in advance!