sexing them is easy, females are larger and have visible eggs on the inside (transparent body). To breed them is another story, from what I heard, they need alot of iron or something like that to breed. It would have to be in another tank of their own.
i had a barrel, put some java moss or other grassy plant. threw in the shrimp and they started multiplying.
temp was about 80
since shrimp are scavengers you can throw in market shrimp or choped fish. Also can use zooplankton or algae which is great if you spawn in an already established tank.
Havent been able to get back into it since the storm and no one has been able to catch a decent amount either.
I have never bred ghost shrimp, but a friend at work did on accident in a ten. I do have some cherry in my guppy ten that seem to have increased in numbers. Which of course was an accident as well.
I buy them from my local bait store. they don't like temps over 75*F, need heavily planted, clean water, and any fish that is remotely predatory will eat them.