Concentrated Vitamin-C Supplement for all Marine Fish & Reef Aquaria Overview Highly-concentrated vitamin-C solution. Buffered; will not impact pH when used as directed. Stronger than competing products. Vitamin-C is associated with improved tissue growth and with aiding the immune system. Intended to provide benefits to all aquarium inhabitants. Well-suited to use in coral propagation. Requires no refrigeration. Composed of purified water and ultra-high purity ingredients. Formulated by a marine scientist.