I've breed ghost shrimp in 10g tanks over a two month period and java moss as well as freshwater ferns help in breeding them. Also, keep the set-up simple. I just had an air stone with a heater and hood. I changed out the water 20% every 5 days and made sure the ph was about 6.5 to 7. Good Luck though, you'll find that they are very easy to breed for feeding purposes.