I used to feed frozen brine shrimp to my tiger barbs and the barbs would swallow the shrimp whole. But the tetras I have now are really small and I can't imagine them being able to gulp down those shrimp. Even the OmegaOne freeze-dried bloodworms I have look too big for these guys. So far I've just been feeding them flakes, which I crush up nice and small. How can I get some variety into their diet?