Sodium Thiosulfate Pentahydrate Crystals

Sodium Thiosulfate is an inorganic compound that is efflorescent (loses water readily) and dissolves well in water. It is used in many different applications like gold mining, water treatment, photography, and leather tanning. Sodium Thiosulfate removes free and combined (chloramines) chlorine from pools. Ideally, chlorine levels in your pool should be in the range of 2-4ppm.  As a general rule, about 2oz of Sodium Thiosulfate for every 10,000 gallons of water will lower chlorine levels by about 1ppm. 

CAS: 10102-17-7

10 Lb Bag