My neons will eat ANYTHING they can get their little mouths on, including bloodworms, brine shrimp and even the cichlid pellets that are so big they just carry them around
Yup, my neon tetras will eat anything, including trying to eat the algae wafer I drop in for my Otos. It's quite a sight watching them move the wafer so that they can get at it more easily.
Flakes work well and so do freeze-dried bloodworms.