<a href=showthread.php?s=&postid=15354299#post15354299 target=_blank>Originally posted</a> by mixer911
John, I think anything over 40", 3/4" is recommended for rimless. Mostly if it is 24" tall. 1/2" will work, but would be pushing it to the limit of what would be considered "safe".
If you feel comfortable doing it yourself, I say go for it. There are a few threads of DIY tanks on here that could help you. But with a tank that size, I would feel more comfortable with a professional job. Have you checked out OCEA for a tank. He is located in Alabama and is pretty close in price to GC. There are a few people in our club that have some new rimless tanks from him and they look Awesome.