TetraColor Tropical Crisps with Natural Color Enhancer SUPERIOR INGREDIENTS: Highly digestible ingredients with color enhancer for use as staple food for your small- to medium-sized tropical fish. ESSENTIAL NUTRITION: Contains all essential nutrients, which can be metabolized. LESS WASTE: Up to 35 percent less waste than competing flakes means more usable food. COLOR-ENHANCING: Crisps have a concentrated center high in carotenes, designed to bring out more intense natural coloration of tropical fish. UNIFORM SIZE: Helps maintain feeding consistency.