That's wrong, a lot of people think they're carnivores but they're not. They're omnivores and need veggies/greens in their diet. In the wild the eat plant matter and the main part of their diet is crayfish (which are filled with plant matter).Angler;3256811; said:You don't need to add greens if the main diet is NLS. Herbivores do great on a diet of only NLS.
Since Oscars are Carnivores, if anything, I would add a higher protein pellet or frozen foods.
That being said, he will still be fine on just NLS.