I've changed my mind about these shrimp, I like the marbled crawdad (Marmorkrebs) ....... If they get too big, I can drop them in the blender (like I do with veggies and sprouts, blend it all together, and make my own flake food. I'm already doing that with lettuce/sprouts and soon will be adding duckweed, frogbit, and water lettuce. I bought some shrimp that the Goldies can't seem to get into their mouth, so the next time I grind up some duckweed, et al, I'll add the shrimp. I'm hoping they love it