In a natural marine setting, stony corals and other filter feeders depend on zooplankton as a significant source of energy and nutrients. A well-balanced substitute for naturally occurring plankton, Tropic Marin's Pro-Coral Zooton provides essential minerals and trace elements required by stony corals (SPS - Small-Polyped Stony corals in particular). This unique formulation consists of carefully selected ingredients designed to promote coral health and new tissue growth. Includes carotenoid-rich spirulina combined with brewer's yeast to provide an available source of vitamin B/B12.