This might be a usefull link for you to get a generalized idea of food from a pond.

http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=362400&page=1

AS for the "math", there is just to many darn variables, and the link above kind of touches upon that with their answers. Your pond size is set. Can't do much about that. But as you learn about ponds, mostly from your own experience with YOUR pond(will vary from others' ponds), you will know more on ways to push the envelope to get more production and holding capacity. Way to much to get into with a single post, or even thread. A few years ago I was at this point you are Griff, and I thought why can't I get a straight forward answer, but then with time, you will learn why the answer is so elusive. Spark only scratched the surface with his comments above.

Last edited by fish n chips; 04/28/15 09:19 AM.