Provides numerous elements important to the formation of various biochromes (biological pigments) complex molecules that give coloration to plant and animal cells through their selective color-absorption and -reflection characteristics. Formulated specifically to provide trace quantities of elements for gradual incorporation into and formation of biochromes known to occur within zooxanthellae such as chlorophylls a and c beta carotene and xanthophylls. Does not influence population density of zooxanthellae which would put the overall health and survival of the host organism in a precarious situation. Formulated by a marine scientist. Liquid. 500-ml.