Bill:

In such a pond, what would you use/what is used for spawning media, and how far apart is it placed in the pond?

You got me thinking here, there's a 1/10 acre pond that I know of that would work perfect as a forage pond......

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).