Plankton Cultured Copepods & Microalgae for the overall health of your aquarium marine life. CopePODS eat detritus, phytotplankton, dead, decaying matter, each other, and turn these items into important fatty acids. PhytoPlankton take excess nutrients such as nitrates, phosphates, heavy metals, iron, sunlight, carbon dioxide and create fatty acids that are critical to the health of many marine organisms.