I am about the start actually building my 700g aquarium in a couple weeks(!!!) but I am realizing the sump may be more problematic than I had thought. I was planning use a 120g tank I have (60"x18"x26" tall), but I realized without leaving any space for work in the sump that means I would have to make my stand 26" tall, when the aquarium itself will be about 36" without lights or anything, which puts me at almost 5 feet tall, without taking to account I am pouring some self leveling cement as the base of the tank, and that since this in in my basement the ceiling are not that tall. How much space do need between the top of the sump and the bottom of the tank in order to do maintenance on it? I really don't have a good place to put any kind of sump or large filter except under the tank.