BM,
I'm not sure but that you want an "environment" for grass shrimp before you seek a stocking source. They like to hide in aquatic weeds and they seem to ocurr in my ponds naturally as long as there are suitable homes for them. What I'm trying to say, that one could "stock" them and they would disappear very quickly, even faster than a fathead, but if one has the natural setting preferred, stocking isn't required, in East Texas at least....build the setting and they will come.