Advise on drilling 75 gallon Oceanic Aquarium

[austinaquaman]

I got this aquarium a couple of weeks ago and have been putting off drilling it. I am a little nervous about getting it right and would like some input. Also, I would like to keep this reasonably budgeted.

What I want: I want to use it as a wall divider coming out from the wall.

What my girlfriend wants: something that looks clean, preferably with as little equipment showing as possible. Preferably as little noise as well (I know no noise is impossible).

What I know: The bottom is tempered so I cannot drill there.

My current thinking: I am thinking about drilling the side (18" wide x 21" tall) that will be against the wall and then camouflaging the pipes or building something (a box) to conceal them. If anyone has any advice here please feel free.

I am also curious about where I should drill the holes. Further down the tank might make it easier to conceal them.

Another concern is the size of holes to drill for a 75 gallon. What size holes and pipes and how many should I have for the drain to my sump and the return to the tank. I'm not sure how this affects the gallons per hour. I do not have a return pump yet so I am open to ideas there as well.

Thanks,
John