My large 90 gallon tank is in a corner of my family room on purpose. I have found, in the past, that the room you spend the most time in works best for fish tank viewing. So while I am reading or watching TV I can look over at the fish tank. I must look at it for two hours plus a day. My other tanks, a 29 and a 10 are in my office so they get less time being viewed maybe 20 minutes a day.