i will start feeding them shrimp i've tried the pellets and they don't really seem to be attracted to it as much as the other fish in the tank. they seem to hunger for live foods. i heard that given them earthworms are generally ok from the bait stores because they don't contain parasites or anything harmful towards the piranhasJoeDizzleMPLS;1997470;1997470 said:you really shouldn't be feeding them feeder fish from the store either, they contain high levels of thiaminase, which is a growth inhibiting hormone, there is also a very high risk of introducing disease and parasites... it really is best to feed them frozen shrimp or fish fillets