Some have heard my tempered tank story before.
Back when we were still getting newspapers carved in stone, I worked at a very large LFS (over 800 tanks). In the early 70's, they came out with tempered glass tanks. We had a 55 set up, up front in the store. Every time a regular customer would come in, Lenny, one of the owners, would say "hey, let me show you something really cool", and he'd wack the tank front with a hammer. Only problem was, he didn't know that tempered glass absorbs blows... to a point. It was Tuesday night, and our best SW customer had come in (Tuesday SW shipments), and Lenny pulled out the hammer. WACK. Tank exploded - literally. 55 gallons of water is a LOT of water. They were both wet, from the waist down. The customer's response? "Yup. Very cool."
Bill
215g FOWLR... and anemones, GSP, gorgonians... carp, that isn't FO!
"I killed my first SW Fish in 1971..."