I think Joshfcb also needs help in figuring out a ballpark cost of these things, so when he goes back to everyone they will have a basic idea of what they are getting into. Sorry, I can't help out much there.
Oversimplifying cost -Tilapia 20to30$/# @ 30#/acre=____
Joshfcb- there is a section for resources. You might get quotes from some of those vendors.
http://www.pondboss.com/resource_guide.asp As mentioned, I think its good to figure out why there was a fish kill. To add to that, possibly a chemical from agri runoff?
