TROPICAL DISCUS GRAN D-50 PLUS colour-enhancing sinking granules for discus. Tropical Discus Gran D-50 Plus is a colour-enhancing food in the form of sinking granules with high (50%) content of protein for young and adult discus and other fish, particularly very demanding species. Its characteristic feature is high content of best quality protein, rich in essential amino acids. It ensures healthy growth and development of young fish and encourages spawners to reproduce. High content of natural astaxanthin intensifies coloration and enhances fishÕs overall condition. Beta-glucan improves the immune system and increases the ability to fight pathogens. Regular feeding with Tropical Discus Gran D-50 Plus ensures fishÕs healthy growth and development, increases their resistance to diseases, encourages them to spawn and intensify their coloration.