Plus if he had uses Nano470, the repair may have been cleaner. There are more videos of this stuff being used. The guy took some glass, glued it to another piece to create a shelf, and stood on it for about a minute i think.
My next tank build, i was thinking about using this stuff to make a all glass build, this way there are no visible silicon lines so it will be a little cleaner. If only i could find someone to buy my current tank off me.