The The relationship between calcium and alkalinity is one of the most discussed chemical relations in reef tanks. Both calcium and alkalinity  are required by a host of organisms that form calcium carbonate skeletons and shells. In a small and closed system like a reef tank, they can quickly become depleted. Consequently, it is imperative that hobbyists ensure that appropriate levels are maintained.

During the last 20 years ,hobbyists have developed many different ways of supplementing calcium and alkalinity in reef tanks. Most of them are using Calcium reactor using CACO3 and CO2, some are using different calcium liquids and some are using the BALLING system based of  CACL  which is the only salt that  is natural as the NSW .None of these are perfect, and all can lead to problems if not used properly. As a consequence of these various interactions, the relationship between calcium and alkalinity in reef tanks is complicated.

Alkalinity itself is a complex term that requires some understanding .In short, total alkalinity is a measure of how much acid it takes to lower the pH of the water sample to the bicarbonate endpoint. That is, how much acid it takes to lower the pH to the point where one has added enough acid to potentially convert all of the bicarbonate (HCO3-) to carbonic acid (H2CO3). During such an addition of acid a variety of things are happening, but those most important in this context are that carbonate is converted into bicarbonate.

A balanced relations between calcium and alkalinity ensure the right rate of coral growth. This growth depends on the symbiotic zooxanthellae that use carbon dioxide during the photosynthesis, making free calcium available for the coral. This process may happen only when calcium and carbon dioxide are present. ROYAL CALCIUM POWDER supplies a balanced ionic formula of CACL with all 70 trace elements found in NSW. A formula that will not alter PH and will keep the right relations of calcium and alkalinity.

Note: Available calcium is also largely dependent on the amount of magnesium in the system. In other words, if the amount of available magnesium is depleted by say pink calcifying algaes, then  the amount of available calcium will drop, due to the development of calcite.

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