I just noticed the top of my stand curves very slight downwards I'm guessing due to the fact that the tank is not sitting edge to edge. So basically the middle of the tank (well more like only the edges are touching the stand) is not touching the stand. I think the gap is about 1mm at the widest. The sides look fine. Do you guys think this will cause a leak in the future? I don't know when this curvature started but I had this setup for over a year.
Oh yea it's a wood stand and it's a 15 gallon tank.