These Clearwater MultiFunction Chlorine Tablets are an incredibly simple and convenient way to maintain clear and hygienic pool or hot tub water. These multifunction chlorine tablets are designed for use with floating dispensers to keep your water clean and clear. They will slowly erode over 3 to 5 days, depending on the amount of water flowing over them. As well as containing chlorine, which kills bacteria and other organisms by disinfecting water, the tablets also contain an algaecide solution that prevents the growth of algae. Some debris and particles that find their way into the water, such as dead skin and algae, are too small to be trapped by the filter system. Clarifier contains flocculants, which bind particles together so that a filter can trap them, producing clean and sparkly water. These tablets are a must-have accessory for keeping pools and spas in tip-top condition.