Ghost Shrimp

I've read from tons of places that you can cram 8-10 Ghost Shrimp in a tiny bowl 3-5 gallons. Here's my experience:

I put 3 large Ghost Shrimp (2 inches) in my 10 gallon with my Betta. 12 hours later, everyone was snacking on one of the dead shrimp.

I put the remaining 2 Ghost Shrimp with my 4 other Ghost Shrimp in the 29 gallon. 12 hours later, I only have 5 Ghost Shrimp and I can't even find the last one.

Ghost shrimp get quite aggressive towards one another and a tad territorial. Especially the larger ones. But you need to buy large ones or else the small ones will just be eaten as food. I don't recommend keeping them in small tanks...especially unfiltered ones.