The presence of nuisance algae can cause unsightly appearance, odors, slime, and coating problems in aquatic media. Algicides are chemical agents used to control or eradicate the growth of algae in aquatic media such as industrial tanks, swimming pools, and lakes. These agents used may vary from simple inorganic compounds such as copper sulphate which are broad-spectrum in effect and control a variety of algal groups to complex organic compounds that are targeted to be species-specific in their effects. Algicides usually require repeated application or continuous application at low doses in order to maintain effective control.