All I know is you don't want to overfeed them 'cause they could get the bloat. Make sure you feed them lot's of veggie matter. I'd stay away from feeding them meat but I'm sure some people would disagree with me.
Don't overfeed and give Veggies like Spirulina flakes or Frozen peas and stay away from mammilian protein! Try feeding once a day. They won't grow as fast but they won't get the bloat and die either.