Controlled dissolution of aragonite within a reaction vessel has become one of the most effective and preferred methods of increasing and maintaining the calcium concentration, as well as the alkalinity, in reef aquaria with high-rates of calcification. In particular, high-energy reef systems dominated by small-polyp stony corals, as well as those with heavy coralline algae growth, can benefit from this method, the results being increased growth rates (relative to many other approaches) when all other physical and chemical requirements are met. Additionally, this method of calcium/alkalinity supplementation is free of chloride, which can become elevated in aquaria utilizing chloride-based calcium supplements if regular partial water changes are not performed. By weight, CoraLazarus is comprised of ~61 - 62% carbonates, ~37 - 38% calcium, ~0.75 - 0.85% strontium, ~0.1% magnesium, and