My rasboras and tetras get the .5 mm NLS pellets, and the rest get 1 mm pellets. They all get each of these once a week: frozen bloodworms, frozen tubfex, freeze dried brine shrimp. My LFS also sells livefood, but I haven't gotten that ever. If I did, it would be blackworms. So that's what they eat: worms, shrimp, and NLS.