Well the "thinking of an upgrade" has now become more real. This may be a slow moving thread, but at least there is a hole in our new family room wall Current tank 75g mixed reef - upstairs in kitchen will be upgraded and relocated downstairs to the family room. Planning for 48"Lx36"Wx24"H, roughly 180 gallons. The blue tape gave me a rough idea of location in the room. Ultimately the opening will be slightly taller to accommodate an access panel above the tank. Photo of family room and garage prior to action.