Phosphorus can be removed biologically in a process called enhanced biological phosphorus removal. Phosphorus has a valence of 5 in phosphorus pentachloride, PCl. NPK fertilizers are three-component fertilizers providing nitrogen, phosphorus, and potassium. These are deficient in nitrogen, phosphorus and humus. Commercial fertilizers indicate the levels of NPK (nitrogen, phosphorus, and potassium). Increase in input of nitrogen and phosphorus generally causes Cyanobacteria to bloom. Excessive doses of vitamin C, magnesium, phosphorus and/or calcium supplements may increase FI. It contains low levels of vitamin B, vitamin B, iron, calcium, magnesium, phosphorus, and potassium. He found that this contained phosphorus and nitrogen, but not sulfur. Buttermilk contains vitamins, potassium, calcium, and traces of phosphorus. Imbalances in calcium and phosphorus levels can result in various skeletal complications. Sustainable options for replacing other nutrient inputs such as phosphorus and potassium are more limited. These are high in protein, vitamin A, calcium, phosphorus, and potassium. The human body is composed of elements including hydrogen, oxygen, carbon, calcium and phosphorus. It is rich in phosphorus, calcium, and sulfur.