A LFS gets blue, black and ghost in regularly lately. They have had great success in getting them to eat. I'll ask them next time I'm there. I started mine with grass shrimp. He'd snatch 'em up and he slowly turned onto frozen squid pieces. Now, after 3 months in my tank, he'll swim upto the surface at feeding time and take the squid from my fingers. Initially, he'd come upto the top water column and swim around. Now, he's content to stay in a rocky cave and watch the happenings. I know everybody will jump on me for this but alli have for cover is eggcrate. So far, neither the zebra nor ribbon have tried escape. I'm betting the larger the tank, the lower the risk for carpet surfing. One other funny thing, when the zebra comes out, my sailfin tangs will flash him and display their fins and he'll back away. Funny behavior.