Start off with TheraA 1mm. It has extra garlic to increase palatability.
Your discus should be eating this as well. Try pre-soaking in water to soften up the pellets before feeding it. It may spit this out initially, but will eventually take it when they get hungry enough.
Why are you recommending this pellets?
Ok, I found the ingredients
Whole Antarctic Krill Meal, Whole Herring Meal, Whole Wheat Flour, Algae Meal,
Garlic, Beta Carotene,
Spirulina, Vegetable and Fruit Extract,
Ginseng, Vitamin A Acetate, DL Alphatocopherol (E), D-Activated Animal-Sterol (D3), Vitamin B12 Supplement,
Niacin, Folic Acid,
Biotin, Thiamine, Riboflavin Supplement, ...
It seems to be good for the fish