Calcium Part A 236ml

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ECO CALCIUM A (Balling Method)* is one part of a 3-part calcium supplement specially formulated to maintain carbonate alkalinity at a natural seawater level of 7 dKH. This will enable the aquarist to maintain pH and calcium levels at or near natural seawater levels that are essential to all reef inhabitants — pH = 8.0-8.4, calcium = 410-430 ppm. Phosphate and nitrate free!