Calcium, Magnesium In Aquaculture

摘要

Aquatic plants and animals get the essential nutrients calcium and magnesium from water and their food. Hardness is usually great enough to supply adequate calcium and magnesium in fertilized ponds, and in ponds with feeding, they are obtained from feed when hardness is low. Calcium ions affect the toxicity of trace metals to aquaculture species. Although of limited concern in ponds, calcium carbonate precipitation can be troublesome in hatcheries. In inland waters, magnesium concentrations can be increased by applications of potassium magnesium sulfate.