Noone has touched on a most critical point. Just because the dresser will hold you for a minute, or an hour or a day doesn't mean it will support a tank full of water indefinitely. That water really wants to be on your floor and will never stop trying to get there! You need to take a critical look at the dresser in question and see where the load-bearing members are. You want the tank to be supported at the very least by two members close to the outside edges of the tank. Consider that a large desk which can easily support a 55gal might not adequately support a 10 gal. I had an old dresser that used to support a pair of 20 gal tanks, but they had to be placed perpendicular to the normal arrangement to catch the load-bearers at the front and rear of the dresser. A large flat expanse of tabletop will sag unless adequately supported.