devide 2 subtract 1 , times 3 ... wait wait.... too much math. Use my method. Just buy it and if it don't fit in the intended spot you set it up somewhere else then talk the spouse into getting another one that will fit...
Hehehehehe worked for me a few times. Darn tank doesn't fit in that spot, maybe I can set it up in the fishroom and get another for inside the house... Always worked.. Yet again, I wonder if thats why I am single again now. LOLOLOL.....
Danny
So you may want to think twice about my stratagy. May back fire and put ya in the dog house.