Ocean Nutrition Formula 1 flakes. Same people that make the frozen cubes.
I use all: frozen, flake, fresh and live. Your radio boxes don't have that option.

I have some Omega One First Flake you can have. It kills pods, shrimp and larval shrimp so its yours free for the asking. Don't know why I still have it. No takers, its probably going to make the trash can soon.