EnviroREDI™ sodium sulfite dechlorination tablets provide a consistent dechlorination rate that allows them to be used in critical locations where the environmental impact of chlorinated water is a concern. This product is used largely in municipal hydrant flushing programs to dechlorinate the water as it leaves the fire hydrant and ensures that the fish are protected from the harmful effects of the chlorine that is in municipal lines.
Sodium ascorbate (vitamin C) is particularly useful for dechlorination of large tanks due to its quick dissolve rate. Its viability as a substitute for sulfite dechlorination is only an economic decision as its benefits are clear on an environmental basis due to the tendency of sulfites to deplete oxygen. When compared with ascorbic acid (also vitamin C), the neutral pH of sodium ascorbate makes it the preferred option for treating large volumes of water that contain high levels of chlorine (>10 ppm).