Hi Guys

I have a 29gal aquarium that I got from my mom's work. The stand that they had it on for years looks to be MDF. Here is the thing. I have had the tank setup now for close to 3 years and for some reason now im worrying that its going collapse. I assume that if it has stood for this long it will keep staying up. It must have been treated with something because water just beads up on it if it gets wet.

If the stand to fail would it be a slow sag or would it be a spontaneous collapse? They said that when they bought the aquarium they also bought the stand with it and that it was made for it?