18" x 65" CR100 Crystal Right Duplex, Autotrol 278 Digital Metered Controller, 4 m³/hrCrystal Right utilizes an ion exchange process for the elimination of iron, manganese, and hardness present in the water, and its minimum pH requirement is 6. 0. It is most efficient with clear water, and ammonia, lead, hydrogen sulphide, and copper can also be reduced. The media bed can be sanitized with chlorine periodically, and the regeneration process is just like a water softener and requires regeneration with the use of salt (sodium chloride).