Thats really interesting, they usually just try the algae wafers but they dont really make it a staple food, since polys are carnivore its really unusual for them to become tottaly vegetarian.I do try to feed more once the lights are dimmed. They are certainly more active then. It's just interesting that of all the things I've put in (worms, maggots, crickets, shrimp (both live and frozen), chopped fish, cichlid pellets and algae wafers), it's the algae wafers they seem to love the most!