My flagfin eats everything I feed, mysis, formula 1, 2, angel formula, nori, blood worms, fortified brine, krill, and new life spectrum pellets. His favorite hands down are the pellets. I would just feed a good variety of different foods, both animal and vegetable based, and let him pick. I use those feeding grids for the gel based foods so mealtime gets extended and the fish gets to pick at something which is what they do on the reef. Once that blueface settles in I would bet he will be eating everything in sight. I dont know if there has been any kind of research on new life foods but I have noticed people on this board using this food with success with some hard to keep fish.