I've had them for 5 days. So far I've tried Rods food, spectrum pellets, flake, Eco eggs, hikari mysis, and frozen cyclopeeze. All they seem to do is hang out face down at the bottom of the tank. Tank is a nanocube 24 with about 40 lbs of liverock, and some Xenia. I added a large fake bamboo plant from an old freshwater tank temporarily thinking they would feel more secure with something to hide in. They are the only fish in the tank. Thanks for any help. Really don't want to lose these guys.