The are actually pretty easy if you have a fuge plenty of live rock, and then some. They will pick pods off the sand bed, they also are quite fond of pieces of algae(ie diatom) in the sand bed, They are so freaking smart, they set up a big tunnel in the sand, when a little amphipod would run down the tunnel they would eat it right up. They are actually my roomates, I wanted them but they would have surely died in my 29g.