Tropical Discus Gran D-50 Plus Sinking Granules is a nutrient-rich food that contains 50% high-quality protein and essential amino acids. A high natural astaxanthin content intensifies colouration and enhances your fish's overall condition, while beta-glucan improves the immune system and increases the ability to fight pathogens. Discus Gran D-50 Plus Sinking Granules promotes growth, development and reproduction in young and adult discus alike.