Add-on to this post - I too stocked ghost shrimp in my pond - I'd guess 4-5 years ago. I believe I'm a bit further north that redonthehead is and I can tell you mine took off like gangbusters and are all over my pond now. Just running a dip net through the weeds along the shallows in warm temps will net you a dozen or more every time. And my pond was frozen better than a foot thick last year. So there's definitely a species that does fine in climates that turn cold.

Dale

[Linked Image from i90.photobucket.com]

"When tempted to fight fire with fire, remember that the Fire Department usually uses water." - anonymous