Theres a story about breeding... This one aquaria owner had a 33-gallon RubberMaid tub and had some bushy plants and 10 ghost shrimp, a coupla snails, no fish. it had a heater and a air pump connected to a four-way connection, which had disposable filters at the ends, so he had 4 small filters. It also had a weak heater i think, i forget. 1 Month later, SURPRISE! 100s of little ghost shrimp were swarming his tub. This is a true story and has some really true elements in it you need for breeding.
There should be no light source from any of the sides, only the top, when you have babies...this is not necessary, but you get a lower mortality rate. This was helped since it was just a plastic tub and wasn't clear.
The snails. Baby ghost shrimp feast on tiny tiny tiny organisms, green water, and if possible, small snails. Sounds odd, but true.
The plants allowed his shrimp to hide from the adults which lurk to eat their own young. This also allowed higher amounts of LIVING shrimp.
Now, i'm not saying to run to Wal-Mart and do this, I'm just saying some elemts you'll need