they eat crickets, meal worms, shrimp, feeders,............ i used to have some for like a year
i'd feed them every other day,.......... i'd feed them each like 3 crickets one day, the next feeding time 3 meal worms, the next time, shrimp cut into small pieces about 3-4 pieces each.
mine learned that if they didn't eat when food was dropped, they'd go hungry until the next feeding time, so there was no chance for food to sit or sink to the bottom.
that's my experience with them,........... and wild caught are aggresive. they'll bite & mess up tank mates' tails if they go hungry,..........