In The Swim Pool Chlorine Stabilizer and Conditioner - 10 Pound Bag

Chlorine stabilizer reduces chlorine loss caused by the sun's ultraviolet rays. Adding stabilizer greatly increases chlorine effectiveness and can actually cut chlorine consumption by up to 25% a year. 100% Cyanuric Acid. Dosage: Use 1 pound per 3,000 gallons for 40ppm stabilizer, 1 pound per 4000 gallons for 30 ppm stabilizer. Do not over-dose, it is important to gradually increase the stabilizer level as it is very difficult to reduce once it has gotten too high. Stabilizer levels should be maintained at 30-50ppm.