Your fish would be perfectly fine if you fed nothing but the NLS pellets. When I first got my fish, I wanted to feed everything under the sun. My cabinet and freezer were stuffed with 654394594 different fish foods, and human foods that I used as fish foods. But if you feed a high quality pellet that's formulated to be nutritionally complete, that's really all you need. "Variety" and "boredom" when it comes to food are human concepts that we try to apply to our fish, IMO.