shellies

I was sitting watching my fish tank and noticed a lot of little things moving near a shell. I thought maybe some food got stuck in the current or something and went to investigate and found that I actually have fry in the tank! I will try to get some better photos but needless to say I am...

I'm thinking of doing in a different direction with my little Chi tank. While I love my shrimp, they are not really doing well for mysterious reasons. Is there any way to do multis or another shellie in such a small tank?