I'm in the ecosphere hobby and have been making successful closed ecosystems for about 3 or 4 years now and I'm trying to spice things up a bit by adding new biodiversity to my freshwater ecospheres. I would love to go to the the great freshwater lakes of North America to collect wild freshwater crustaceans like Mysis shrimp; however, I live across the country and at least for now that kind of trip is just too expensive and has too many unknowns to warrant. I am interested in trying to make some saltwater ecospheres in the future but that would also take a trip to the sea and that's also not currently a viable option. I would like to just purchase freshwater Mysis shrimp but it seems that the only sellers are only selling saltwater Mysis shrimp as live feed. Some fish and crustaceans can tolerate transitioning from saltwater to freshwater and I might just try and see if I can get a small colony of Mysis shrimp to do so but I would like to consult anyone who might have any idea as to whether trying this would just be a total waste of money or not.