Problem with normal pellet food is Discus can end up with bloating other intestine problems if you just feed them average fish food you get from petshops. Discus needs food which is specially made for them. You can find several quality Discus food types including Hikari Discus food but also here's another really good quality type of Discus food brand.
You might already know about Cobalt Brand Discus Flake Fish Food or have tested their sample food. Interesting thing is Discus seems love this Flake food. This product is Co-developed by a internationally well-known Discus breeder, Discus Hans. It was developed to keep show quality Discus fish and to keep them in top condition and color.
Cobalt Aquatics Discus flake fish food loaded with nutrient rich ingredients ensuring consistent growth and superior color.Now you can buy it from Amazon, only 3-Ounce for $11. It's a new product but you can read plenty of positive feedback from Discus keepers and breeders already. Just check the Amazon page.