New poster, new pond design

Hi folks, I'd like to run this perliminary design past of few of the
experts.

http://www.geocities.com/erviservy/pond/Design1.htm


Couple of questions:

Should I feed the veggie filter completely across the bottom or can I
expect water to flow through it from left to right?

Should I have 2 falls from the upper level of veggie filter into the
lower marsh plant area?

When pulling water from the skimmer and bottom drain at the same time,
is that normally a 50/50 ratio?

Thanks for any advice,
steve