My rainbow shark likes Algae Wafers. After feeding the others, just drop an algae wafer, or one of the other kinds of wafers, and he'll be good. Might even try 1 or 2 shrimp pellets to see if he'll go for that. As for the flakes, my rainbow comes out and eats flakes with the others when he's hungry. But really likes his algae wafer. And what's left when he's done, the
CAE's finish.