Hey guys. I've had this idea for a while now because I have some culls from my shrimp tanks. Right now I have a ten gallon for blue neos, a ten gallon for bloody mary neos, and a five gallon neos. I rarely have blue culls, but I have some of the reds and most of the black shrimp that I need to take out of the colony. The black culls are actually a nice blue color that I'd want to keep (or at least sell as culls), but I can't keep it in the black rose tank or move them to the blue tank. I was thinking that the tank would be either 2.5 or 5.5 gallons. I don't want to spend too much on this tank because I'd be selling these shrimp out quickly. I don't think I'd add a light. I could put sand as a substrate though. I have BacterAE to help establish biofilm. I could buy a small sponge filter to put in the tank (I have a 10 gallon air pump hooked up to a sponge filter in a 5.5 gallon, but I don't know if it would work if I split the airline?). Would this be a reasonable set up for shrimp to be held there temporarily? I'd appreciate any suggestions.