no no no.... you want there to be sillicon inbetween the joints where the glass meets but you also at this point want to do the V, while its all wet, once you have the inside all done you can come to the outside and wipe off the excess...., OH before you do any silliconing you need to wipe it all down with aciton and rubbing alchahol to det any and all oil and dirt off, even iff it looks clean it must still be wipped off, an excess of fingerprints could cause the silicon not to bond to the glass....
so #1) get clamps, aceitone, rubbing alchihol and framing squares(anything to ensure that everything is good and square)
2) make your cuts as needed, then rub it all down and make sure its clean
3) lay the pieses out like in the pic.
4) apply a thin bead like in the pic.
4) have a friend and put up the front and back, then the sides, clamp lightly
5) square it all off, make sure its not in a dimond shape and all edges are at 90*, from bace to walls and fron to sides, once it is, Clamo it all down harder...
6) tape the edges, and sillicon the inside of the tank to ensure a good bond useing your wet finger to press the silicon into the seem, you want a 1/4" on each side.
7) let dry for 1-2weeks
8) install braces.