SeaChem Neutral Regulator™ adjusts pH to neutral (pH 7.0) from either a low or high pH and maintains it there. It softens water by precipitating calcium and magnesium while removing any chlorine, chloramine, or ammonia. The use of Neutral Regulator™ makes other conditioning unnecessary. To lower pH below 7.0 use Neutral Regulator™ with Acid Regulator™ (or Discus Buffer™). To raise pH above 7.0 use with Alkaline Regulator™. All of these products will enhance and stabilize the freshwater aquarium environment. Use Fresh Trace™ to restore the proper level of trace elements required by thriving, healthy freshwater community fish. A 250 g bottle treats over 800 gallons. Freshwater use only.