How often do shrimp molt?

[BCOrchidGuy]

My understanding is that people don't have much luck with cleaner shrimp, but I have two peppermint shrimp in a 20 and they have hundreds of babies. I keep a sponge filter in there and they seem to be doing well, I will focus and really give it a shot in the near future. Baby shrimp make excellent food for your fish, inverts and corals. My cleaners breed often but I doubt I will ever get the babies to grow, however like I say, everything thinks they are yummy.