Starphire is a clear glass made by PPG. They were only making it up to 1/2" thickness when I got my two big tanks built, so I would have had to do two pieces back to back which has a lot of issues.
The other glass types are not quite as clear as starphire and more prone to scratching. These are low iron glasses that come with the name ??can't remember:lol:
Also, PPG was supposed to start manufacturing the 3/4" again, but I am not sure if they have yet or not.