Hello I recently acquired a 150 gallon aquarium and it has two drilled holes on the back glass, one on the far left, and one on the far right. One of these holes a little bigger than the other. I also have a 75 gallon aquarium I'm trying to turn into a sump but have no idea how to. Does anyone know how to do the plumbing to the sump and how to turn it into a sump? Any help would be appreciated thanks!