Regal 12001590 Pool Stabilizer, 4 Lb. 100% cyanuric acid - chlorine stabilizer. It prolongs the effective life of chlorine by reducing loss caused by the sun. The ideal level of REGAL® Pool Stabilizer (also called Conditioner or Cyanuric Acid) is 40 ppm.
WARNING: The following product(s) can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov