can i put some ghost shrimp in my pond? i think they would be very good scavengers, after all they are the "underwater roach". but my experience with ghost shrimp i get as feeders is, they die within 2 days of buying them! ive tried leaving them in their own water with an airstone, brand new freshwater, tried brackish water, and even fully saltwater. all those attemps and the only one that seemed to work was the fully saltwater one, and only 2 shrimp stayed alive in there. any suggestions? (oh and i dont mind if my fish eat the shrimp)