I bought a used 55 gallon tank, and the center brace was broken. I tried to reapply it with aquarium silicone, and it broke off again a day later. I read that using a custom piece of glass would be best, so I bought that today and put it in with silicone. I'm hoping it stays, but for some reason I feel that if the bar broke after a day, the glass will too. Anyone have a similar experience, and have advice? Should I just buy a new tank?