Eutrophication has increased with the use of modern technology and chemicals in our day to day life. This has led to the frequent occurrence of water or algal blooms. Most of these blooms are formed by members of Cyanophyta, the blue green algae. These blooms result in the choking of water channels and a very disagreeable smell from the water bodies. Prevention of nitrogen, phosphorus and other salts from mixing up with water bodies reduces eutrophication. Circulation of oxygen or the addition of copper sulphate to the blooms also control them. The use of balanced fertilizers is highly commendable.