My 125g reef tank...always a work in progress. This aquarium has a seperate fish room that contains all of the plumbing including the sump, refugium, protein skimmer and return pumps. This makes the display fairly quiet and a joy to view.
My propagation system has become more of a quarantine system. Three custom Oceanic 25 gallon tanks plumbed to a common sump with each tank having a valve so I can place them in or out of the pumbing loop. I am still working on the lighting setup for these tanks and have gotten somewhat sidetracked with my 125g reef.