I panicked a bit when I bought my first one and started reading whatever I can find.
almost all those with experience with them say that Feeding is what has kept them alive.
Both Gold's and Denny at Concept have also said the same thing..."ya gotta feed it"
The red and green are the most hardy if my memory serves.
I feed all kinds of stuff.
They like Brine shrimp and Mysis too.