SeaKlear Spa Sanitizing Granules are a highly effective way to sanitize your chlorine pool, keeping it clean, clear, and healthy. Its quick-dissolving granules can be added directly to your spa water without any messy pre-dissolving or mixing needed. Each granule is made of 99% pure chlorine for superior performance. Best of all, Spa Sanitizing Granules are made to the exacting standards SeaKlear demands of all its products, allowing you to buy with confidence.