For what its worth, I have to agree with gonefishin. While to small a territory will create a quicker death for the shrimp, having a lot more room will only delay it IMHO. I have 4 brevis in a 30g long along with several other fish, and I watched one of my brevis hunt down and kill (and eat part of) a ghost shrimp that was easily the same size as him. All the brevis had to do was see him and the stalking was on.
