Freshwater Shrimp Clasification?

I have been catching a freshwater shrimp in a local pond, (Winnipeg, Manitoba).  They are grey, about 1/5 of an inch long and swim very quickly.  The fish love them.

Does anyone have any insights into what these are.  I think they are?  I think they are fairy shrimp but I have not been able to confirm this.  I would also be interested in tips for the care of these shrimp.

They appear to feed on algae on plant leaves.  

Thanks in advance.
Bill Hamlin