I've use Tetra Min flakes for over 20 years in my tanks, i even feed it to my discus along with other foods.. I mean i technicly have no choice because i have neons and other tropical fish in the tank, but my discus gobble it up lol.
Never had much luck with pellet foods.. any fish ive used pellet foods on.. discus, african cichlids and so forth they dont eat it.. Frozen Bloodworms are also a food all my fish love eating.
Heck my neons and gold barbs, and siamese algae eaters, discus and even my Golden Killifish in my 92g tank they eat Bloodworms and beaf heart.. I was shocked to see my neons gobbling up beefheart.. So now i look at flakes as just something to add variety and vitamins to their diets vs a main course meal