The BEST granular chlorine on the market! Can be used in any pool or spa but has a particular interest to owners of vinyl-liner pools, fiberglass pools, painted pools, all spas, and hot tubs. Because it is fast dissolving and has a near-neutral pH, it will not cause damage to the vessel. Chlor Brite is pH-neutral with a 99% active ingredient. A slower dissolving or more acidic compound might bleach the vinyl, fiberglass, or acrylic if it were to be in contact with the vessel for an extended period of time. Dosage: 3 oz per 10,000 gallons. Chlor Brite Granular Chlorine is a high-quality and affordable way to keep your pool sanitized. This fast-dissolving sanitizer can be used for regular chlorination and super-chlorination. With 99% active ingredients this chlorine works with the power to clean your water. These multipacks come individually wrapped and dissolve rapidly so that you can avoid the mess and residue that traditional chlorine can leave behind. This granular chlorine has an added UV inhibitor which slows down the process of the sun burning off chlorine in your pool and keeps it sanitized longer. Use the effective and powerful Chlor Brite Granular Chlorine Multipacks to sanitize your swimming pool affordably.