TetraMin and TetraProVeg. Also, twice weekly treat of TetraDelica jellied daphnia, bloodworm or brine shrimp. Or, occasional live daphnia, bloodworm or live shrimp. Also, vegetables 3 times weekly or so: peas, sprouts, spinach etc.
Mine get Tetra Pro or Tetra Pro colour as their standard diet, with freeze dried bloodworms, daphnia or brine shrimp as an occasional treat. They also like to pick at the vegetables that are in the tank for my plec.