The sump set up for the 360 gallon. It is a freshwater tank and I wanted to keep things relatively simple. The sump is a 60 gallon breeder style tank, essentially a shorter 75 gallon. Due to the width of the doorway, and the tank being 6 feet long and 4 feet wide, it had to come through on its side which limited the height of the stand, hence the slightly cramped plumbing.