Electrolyzer role: 

 Electrolyzer test method is the U.S. Food and Drug Administration (FDA), has been used to identify contaminated water for basic water quality testing to determine a simple method for the pure water needs testing is useful when the actual meaning, allows users to clear, intuitive to see their actual situation of drinking water daily. 

 Electrolyzer principle: 

 Electrolyzer power, in the current under the effect of dissolved Fe ions out-price (iron) ions, they are negative with the price of water OH (hydroxyl) ions, forming insoluble FeOH (iron hydroxide) particles. The particles of colloidal particles and adsorption of a strong cohesion, and thus the formation of organic or inorganic substances in water adsorption condensation process. At the same time as the current role of the original metal ions dissolved in water, such as manganese, potassium, cobalt, etc. to restore them, and gradually gathered to form the metal group. Since different metal ions show different, resulting in the color separation.