Sam wrote:
So far, 12-03-04, everyone has agreed but I don't know... water
pressure might be x at so many feet depth but that is water pressure
from all sides pushing in or out on a gauge. In the above situation
the outside of the aquarium is not under pressure and it would seem
that at a constant depth the more water that was inside, as in a
bigger aquarium, it would add more and more weight and therefore more
pressure on the sides.

Yep. I will say that youo are totally correct, and the teachings of
modern physics are all wrong, if you can answer one question...

In making the tank bigger, to hold more water, without making it any
deeper, then you must make the sides longer and the bottom larger...
there is a greater weight of water but it is spread over a larger
area... thus the pressure (which is defined as weight or force on a
given area unit) remains the same.

So.... how do you make the tank bigger without making it any deeper and
not increasing the length & area of the sides & bottom?

DSK