Here is the background information. I currently have a 360 gallon reef tank in my classroom. The tank is acrylic. The dimensions are 4' X 6' X 2' deep. It has been set up for about 5 years. I bought the tank used. At that time the seams were all solid with no indications of any imperfections. About two years ago one of the back seams began to separate. It was in the overflow so I drained the tank below the level of the overflow cleaned it and put in a 1" X 1" piece of acrylic that ran from the top to the bottom and this fixed the problem. Until January of this year when the seam on the front of the tank on the same side began to fail. When I set up the tank I made sure it was level from about every angle you could think of since I had friends that had failed to do so with catastrophic results. I am currently planning on replacing the tank with a glass tank because this is the second time I have had an acrylic tank fail and I am over it. The current stand is a welded steel stand with a plywood top which is covered by a sheet of foam insulation. Which leads me to my question, should I replace my stand? If you were replacing the tank would you replace the stand?

