I know its much smaller, but i resealed my 40 gallon corner hex. I just cut all the old silicone out with a razor blade and cleaned it up. Got a couple tubes of sealant from the LFS and went over all the seams. I also went to lowes and bought a silicone tool for smoothing out the silicone in corners. Worked out great. Tank has been up for 2 years now and no problems at all.