Colour-enhancing food in the form of sinking granules, for everyday feeding of all species of discus and other fish with high nutritional requirements, especially those that feed in the middle layers of the water or at the bottom. The high content of easily-assimilable protein meets the dietary requirements of most demanding species and stimulates healthy growth and spawning. Vegetable roughage and Spirulina platensis algae regulate digestive tract activity and prevent constipation. DISCUS GRAN has also been enriched with a high content of natural astaxanthin, which intensifies coloration.