1" Bromine Tabs Plus have increased sanitizing strength with 98% active ingredient. They can be used with either floating dispensers or in chemical feeders. A safe, yet effective alternative to chlorine, Leslie's Bromine Tablets Plus provide powerful sanitization while reducing the side effects of red eyes, skin irritation, and strong chemical odors. Ideal for indoor pools and spas, Bromine Tabs Plus dissolve slowly and attack and eliminate algae and bacteria, leaving you with clear and healthy water. These 1 inch brominating tablets are easy to handle and work well in floaters and automatic feeders for pools and spas.