Quote Originally Posted by witecap4u
What got me was the $1500 jump between the 135 and the 150 gallon. They are pretty much the same tank, only the 150 is a couple inches taller. Must be the extra water.

cs
When you make a tank taller, you sometimes have to make the glass thicker because of the extra pressure from the column of water. That is probably why there is a jump. If you make a tank longer, you have the same pressure, so you don't have to increase the thickness of the glass.