Contains calcium, strontium, and magnesium in the same ionicratios found in aragonite. This unique feature increases theusefulness of Kalk+2 to reef-building invertebrates such as corals, clams, calcareous algae, etcProvides temporary alkalinity and helps maintain pH within thedesired range when used as directedAdds no conservative elements, such as chloride, to theaquariumImproves upon the industry-standard powdered calciumsupplement over the past three decadesFormulated by a marine scientist