Clorox® Pool&Spa™ Swimming Pool Chlorine Stabilizer, Helps Chlorine Last Longer, Saltwater Pool Compatible, 4LB Pack of 1

The Clorox Pool&Spa Chlorine Stabilizer contains 100% Cyanuric Acid, which helps to prevent chlorine from evaporating from the pool. It has a shelf life of approximately 5 years when stored correctly. The product takes days to a week to fully dissolve when broadcasted directly in the pool, but can be added to the skimmer for slower dissolving over the next 48 hours. The product has had some mixed reviews, with some customers finding the granules to be large and dense, resulting in difficulty dissolving. However, others have found the product to work well in maintaining stabilizer levels and preventing chlorine levels from depleting too quickly.