Calcium supply for marine aquaria

The natural calcium concentration in seawater is approximately 420 mg/l. In the aquarium, the range should remain within 380 - 440 mg/l as far as possible. Below 360 mg/l, significant restrictions in the skeletal development of hard corals are to be expected.

Values that are too high ​​lead to problems with the pumps and other devices due to precipitates, but bring no advantages that would justify this.