they are not easy, at least they weren't for me. i could not get them past about 5 weeks. i tried live mysids, live amphipods, live copepods. I have read that the ones that come in as eggs usually hatch too early and that is what makes it difficult. i have had success in the past ordering two month olds from a captive breeder (who is no longer breeding them). best place to find them and information is tonmo.com. also, even the dwarfs get to be 4 to 6 inches long - way too big for a 3 gallon tank.