I have had my tank for four years, but it was broken down and all inhabitats were placed in a 10 gallon twice--Once when I moved and once when i screwed up (i went on a trip and the water level dropped to the point where my return was shooting bubbles...Effectivly turned my display tank into a protien skimmer, so I tore it down and cleaned everything...Didnt lose a thing though!!) So, if you count the down time, its been up about a year.
tw