Just received a nice little school of pygmy rasboras and ... they don't seem to be eating. I thought that they would eat dried flakes like the rest of the tank (danios & tetras) but they don't seem to leave the bottom of the tank during feeding and nothing makes it that far down. They also ignore the sinking pellets I have for my shrimp. Haven't been able to find much info searching and wonder if I shouldn't be feeding them something else?