Calcium carbonate in the scale from water.
D002118:Calcium; D002119:Calcium Carbonate; D002136:Calcium, Dietary; D002254:Carbonates; D014867:Water
D002136:Calcium, Dietary; D002254:Carbonates; D014867:Water; D002119:Calcium Carbonate; D002118:Calcium
CALCIUM; CARBONATES; WATER