I have found my guy to be mostly carnivorous, and I have read about their need to eat driftwood to keep their digestive system working (Frankie gnaws on the wood constantly. Its almost reminds of Maggie Simpson with her pacifier). Frankie's favorite foods are massivore, krill, blood worms, and prawns. When I first got him I fed him after the lights had been off for a little bit to let the others kinda go to sleep. This way he was more comfortable in the dark, and didn't have so much competition. Once he got used to the food and the environment, i was able to feed whenever. Now he moves competitors out of the way.
Also, I used prazipro to deworm him, and it seemed like he may have needed it. GL
Jen