Contamination of water or any water bodies with the high amount of phosphate from the inflow of agricultural waste water polluted with fertilizers and pesticides and the disposing off the industrial waste water can contaminate the water with phosphates which leads to the rapid growth of algae in the water, turning the water and water body whole green is called Algal bloom. The decomposition of algae by the bacteria continuously produces foul smell and the algae makes water polluted and undesirable. The amount of dissolved oxygen also decreases and can lead to death of aquatic animals.