The ones I have now are "Top Fin Brand Shrimp Pellets", made for bottom feeding fish. I feed them to my craw fish, but they are the same thing as I used to use. I got them at petsmart. my red bellies would munch the **** out of them. I didn't feed them those initially, though, I realized they liked them by accident, trying to feed the pellets to my other fish (none of which liked them). my piranha were pretty young at the time (bout the size of a half dollar) when they got hooked on the pellets, but ate them until I got rid of them (they were about the size of my hand, or 6-7") because I was moving to FL. probably a lot harder to get an adolescent or adult on them.