Just one shrimp left, but I don't think it's going to die. I even think it might be the one that lived from the last bunch. It is/was the largest of them all. It's also a female, as I can see the eggs developing inside, but unfortunately there isn't a male to fertilize them.

I think I'm just going to wait and see what happens rather than buy more. Though they are cheap, it's a gallon of gas and 30 minutes to get to the store that sells them. Also, though I don't expect anything else to die, it has occurred to me that if everything does die then I can focus on creating a process to create quality water without worrying that messing with the water is going to kill anything.