Product Short Description: Sodium Thiosulfate used as a Pond / Aquarium Dechlorinator. This product also used as a Photography as a fixing agent (hypo) to dissolve unchanged silver salts from exposed negatives. Product Description: Sodium Thiosulfate commonly used in Dechlorination of municipal wastewater, pulp & paper, power, and textile water treatment plants and as an Oxygen scavenger in oil well drilling process in Mining industries. Also chemically suitable for Aluminium cation reaction. Sodium Thiosulfate used as a Pond / Aquarium Dechlorinator.