with a glass tank do u silicone the sides to the sides of the bottom glass or to the top of it? I was using the garf thing and it told my for a tank 60x36x24 that the bottom was to be cut 59 1/4 " confused me. im thinking about attempting a glass tank instead of a ply tank. i was going to build a ply tank 5x3x2 but its a lot cheaper to do it in glass. I can get 12mm glass for $3.80sqft x 47 and its the same cost as the plywood. And I won't have to worry about 3 gallons of liquid rubber.