Ghost shrimp breed like mad but keeping the shrimplettes alive is hard. Our females all let go at the same time, we had tons of shrimplettes floating around but couldn't keep them alive. They were in
FW. I tried fry foods (Hikari first bites) powdered egg yolks, green water (infusoria) etc. All of them died.
The next time we saw the females carrying, we slowly mixed reef salt into the water to get it to BW (this was in a 5.5g holding tank) same thing, eggs hatched, shrimplettes swimming then all died.
Breeding is not the issue for sure, it's keeping the shrimplettes alive that remains the problem.