Oh yes i only meant that the long side panels, front and back, should be 19mm. The 30" sides and bottom would be fine at 16mm even at 33" height.
And yes i think 16mm would work fine for all panels of a 72x30x30 tank with proper bracing.
B.E.A utiful.
Thanks a lot. Very clear now. Now I can go back to glass manufacturer and ask for re-quote.