Kent Marine ChromaPlex is a unique blend of aqua-cultured, naturally-occurring phytoplankton that contains essential fatty and amino acids, fiber, and high levels of carotenoids. Carotenoids have been shown to increase coloration intensity of blue, green, orange, yellow, and red tissue pigments in filter-feeding marine invertebrates. May also be used to supplement and fortify live foods. Particle size from 5 to 25 microns.