I've got a 75 gallon, which I thought was an AGA 75. On the bottom brace between the brace and the glass is a big orange sticker that says "tempered glass DO NOT DRILL". Would that imply that all panes are tempered or just the bottom? I have a 55 that has a sticker that says "all panes are tempered glass, do not drill". The 75 is probably 8-10 years old. Any way to find out what the manufacturer is and whether the orange sticker means all panes are tempered or just the bottom?