I just recently aquired a 75 Gallon with stand and canopy that I plan on transferring my 29 gallon to. I decided to start first with the sump/fuge and have come upon a few measurement issues. Because of the Stand and the hight of the doors in the front, the largest size sump I will be able to fit under the tank is a 20L. I have searched far and wide on actual dimensions of a successfull 20L sump/fuge but have just found pictures (all be it helpful, leads to a lot of guessing). I have added a shot of a draw up I did on what I think is a good plan, but this is my first attempt and am assured that I am off. The equipment I have decided to use is a ESHOPPS PSK-100 In Sump Protein Skimmer, Eshopps PF800 Overflow Box and Mag Drive 9.5 Return Pump. My big concern is the return pump chamber, right now I have it set up as 5"x12.5"x8", is this going to be enough volume or do I need to make it bigger.