another option would be to use 2 small sumps next to each other, connect with a few U shaped PVC pipes and just remove air from each and it will add volume without having to build a stand.
thats what im working with it takes up the whole stand! lol i have like 6 inches of space on the one side im like confused because im new to reefing and i keep reading different things that the refugium is good and other people say that its not needed to have a good tank...so i guess idk what to do