Double Pane Your Tank!

[titus]

Hello,

Guess what I saw at Superstore tonight? All of their fish tanks are double paned! The bottom piece is like some 3/4" stuff, then all the sides are like 1/2" and double that for the second pane. Wow. Expensive tanks. I wonder how much money they can earn by selling fish. I suspect the margin for fish to eat are relatively low.