Bill, Thanks that is what I was looking to find out. I assume the freshwater shrimp your talking about is the "Ghost Shrimp"? I see them in the fish stores. I was thinking of buying some and adding them in but was worried about thier chance of survival and or their ability to stand up to the elements.

I will look into the Papershell crayfish (Orconectes immunis). I just grabbed what was in the creek when I added them. was strange watching them march up the driveway when we had heavy rains.

Bummer on the Gambusia I would have loved to try them in the pond.

---------------------------------
1/10 - 1/4 acre pond plus 16 ft deep/ Plus 40 ft by 20 ft by 6 ft deep koi and fathead minnow pond next to it. Upstate NY