It is suitable for use in systems fed with hard water. It prevents corrosion by forming a film layer on the metal surface. It is easy to use and economical. It is a unique combination of corrosion inhibitors, crystal growth modifiers and dispersants developed for open circuit cooling systems. Thanks to its scientifically adjusted ratios, it prevents corrosion in the best way while keeping the heat transfer areas clean. Appropriate microbiocide selection and use of pH reducers are required for a complete conditioning program. TEKNOPHOS KL also needs hardness ions for the film it will form on metal surfaces. Therefore, it is suitable for systems fed with hard water.