Brightwell Aquatics PhytoChrom - Color-Enhancing Phytoplankton 1-30 micron 500ml / 17oz Provides 6 types of phytoplankton ranging in size from1 - 30m Ideally-sized for many soft corals, clams, sponges,tunicates, tube worms, bryozoans, larval crustace Formulated to provide over 200-million phytoplanktocells per ml Does not require refrigeration Supplemented with a proprietary amino acid to aid icoloration of invertebrates