Neutral Regulator, 500 g / 1.1 lbs Adjusts high or low pH to a neutral pH of 7 Softens water by precipitating calcium and magnesium while removing any chlorine, chloramine, and ammonia Use in combination with Seachem Acid Regulator or Discus Buffer to lower pH; Use in combination with Seachem Alkaline Regulator to raise pH 250 grams treats up to 1000 US gallons