That same thought came to me after I set it on the top. I built it bigger so that I could have tanks on either side of it. However now i am thinking of doing 1 of 3 things. 1. Just keeping it in the middle and hoping for the best. 2. Sliding It off to the left side and then having a smaller tanks on the other half. Maybe even another 46 gallon. The Tank will be supported on 3 sides for sure. the middle will have less pressure on it, and even if it does it does have the one center support. Either that or I get a bigger tank that fits the stand, which could be in plus of 72gallons....its a pretty big stand.