That tank is/was really on that.... cabinet? So, let us treat it seriously. Bud, that is a disaster waiting to happen. Over time gravity will cause the seams to ruin themselves and eventually either the glass will pop out of place or it will just break. All of that water will be on the floor. If you're not home then the fish will die. The floor and the room itself most likely will be ruined. This is not something you can do, you must take it off. Get some cement blocks and a piece of plywood that is capable of holding the tank and make a cheap strong tank stand.