Thanks for the link.
I have some feelers out to some people that have better information on this than I do. Some of my friends have ponds in Ohio and if the grass shrimp survive their winter I think that they will survive mine too. I will see what they have.
This whole northern pond thing should really have its own manual. Maybe when I am done with all of this and I catch my first five pound smallie I will write one.
In the mean time, I am documenting all my research so hopefully if I eff up I can at least feel like I tried my hardest LOL.
Ronald