I see the same thing as far as trying to take while flakes haha. But they are great to watch and I wondered about the Fluval bug bites but my LFS only had med-largeFinely crumbled flake food--- they took a few days to learn to take it from the surface but they're quick learners and they now crowd around the front of the tank when it looks like I'm going to feed them. I also use Fluval bug bites (the tiny size) as treats. I've watched them hunt small swimming organisms and I think they'd eat any kind of infusoria you happened to have--- they forage all over the tank, including the bottom, although they can't pick up food off the substrate. They have very small mouths though--- I threw a full-sized flake in there once and one of them ran off with it and tried to eat it, but kept having to spit it out.