Snooze wrote:

"Damir Crnkovic" wrote in message
...
How to make a outdoor pond with big window? Somewhere on internet I saw a
pictures of this, but lost links. Can anyone help me?

That would be an aquarium. Your pond would either have to be above ground,
or you'll have to build a subterrain observation area.

I imagine he knew that. However, any books/articles about building
aquariums will tell you the important detail - the thickness of glass or
plexiglass you'll need, and how to seal it. Treat it as an aquarium equal
to the height between the bottom of your viewing window and the surface of
the pond. Any depth below the window makes no difference to the pressure
the window has to withstand.
--
derek