Monocalcium phosphate most of aquatic animals take in feed phosphate through rectum, it is necessary to give it soluble phosphorus form.The biological availability of monocalcium phosphate is much higher than other feed phosphates such as dicalicium phosphate, bone powder,tricalcium phosphate. It is auxiliary feed for aquatic animals,poultry and livestock. It can promote feed digestion,put on animal's weight, cure diseases such as rickets, osteomalacia etc.