Do you have problems with your Ghost shrimp and RCS together?
I ask because Ghost shrimp are usually fine with RCS (of course there's always an exception); a lot of people keep them together because they won't cross-breed. You just have to watch at feeding time so the RCS get food, too....but even among themselves, there are pig RCS. I have one female who grabs up a piece of an Ocean Nutrition Shrimp Wafer and runs away as fast as she can.
In the other aquarium, Willie will follow the wafers to the bottom and lay on them for 30 seconds to a minute before he lets the shrimp eat!