This is a discussion on Hatching brine shrimp within the Beginner Freshwater Aquarium forums, part of the Freshwater Fish and Aquariums category; -->
I have been hatching out brine shrimp for a while now. I started using the soda pop bottle one and now have two hatcheries ...
However, I am curious: since they hatch in salt, and we dump them into freshwater aquariums for the fish (marine does not count here), how long before the fresh water kills them? Since there is no mouth or anus, I think it would be osmosis that would do them in eventually, if they escape the fish.
The bit of research I just did supports the 5-6 days in fresh water. In the proper salt water environment, they reach adulthood in 8 days and have a lifespan of 3 months. They can get to .8 inches in size. They are filter feeders.