Natural zooplankton is an important source of energy and nutrients for stony corals and other plankton filter feeders. Tropic Marin Pro-Coral Zooton is a well-balanced plankton replacement for stony corals, specifically, small-polyped stony corals and other plankton filter feeders in a saltwater aquarium. It consists mainly of selected marine ingredients rich in trace elements and minerals. Spirulina is carotenoid-packed and if combined with brewer's yeast will provide the natural B vitamin requirements and, in particular, vitamin B 12.Tropic Pro-Coral Marin Zooton+ plankton substitute for SPS corals and other zooplankton feeders+ with selected marine ingredients, which are rich in trace elements and minerals from the sea+ for energy supply and growth of corals+ rich in carotenoids and vitamin B12