Advanced Vitamin, Minor, & Trace Element Supplement for all Marine Fish & Reef Aquaria. Unique vitamin and minor and trace element complex for establishing and replacing substances important to marine invertebrates, including corals, clams, and their allies. These substances are particularly important to biological reactions. Does not contain minor or trace elements not expressly known to be utilized by marine organisms or take place in chemical interactions. Vitamins are present in ratios found in the tissues of filter-feeding marine invertebrates. Minor and trace elements are present in natural seawater ratios. Composed of purified water and ultra-high purity materials.