High-purity powdered calcium. Increases the concentration of calcium in marine aquarium water to provide corals and other reef-building invertebrates with one of the most important elements required for growth.

Stronger and more economical than liquid calcium solutions; created for hobbyists maintaining multiple reef aquaria. High-purity ingredients; contains up to 37% (370,000 ppm) calcium by dry weight. Formulated by a marine scientist.

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