I know I need my head examined but I bought the 180 Glasscages Tank Posiedon's Reef was selling before their move. A huge undertaking. I am jumping from a 75 gallon with a HOB overflow with 20 gallon sump below. I am planning an in wall display. With a small ( 4' x 7') fish room. I would love feedback on what to do and what not to do from someone with previous experience dealing with larger tanks. Also if someone has a similar setup and is willing for me to take a gander it would be appreciated. It is my first (and last) big tank build. I have been looking at the large tank discussion forum on RC. I will try and posts pics later of my basement demo.