One of my females is carrying a bunch of fry.She is still keeping them inside her mouth.But release them at night or when there is no one near the tank. The fry has fins but they don't swim. They just push themselves when swimming.I don't see an egg sack with them. What do I do next. They are in a seperate breeding tank with the mother. What do I feed them. Should I start with BBS or Crushed flake food.