Sodium Sulfite, or Sodium Sulphite, dechlorination tablets are the most common form of dechlorination tablets used in flushing applications. The tablets are visually pale green color, with an 92% active ingredient (Sodium Sulfite). The dimensions of each tablet are 2 5/8 inch diameter and 1 inch thick. The weight of each tablet is 140g (5oz), the total (pail) container is 48 pounds of tablets. ENVIROredi Dechlorination Tablets