BioGuard Bromine Tablets - 50 Lb Bromine is effective as a swimming pool water sanitizer and disinfectant. BioGuard Brominating Tablets are an excellent alternative to chlorine based systems. Ideal sanitizer for indoor pools. Highly effective for outdoor pools as well. Bromine is an excellent sanitizer choice because it works well over a wide pH range and is a low odor sanitizer. This product must be applied through a bromine feeder. 96% BromoChloroDimethylHydantoin (BCDMH) Excellent for indoor pool applications because of reduced odor. Used with automatic feeders - ideal for commercial applications. Bromide regeneration makes maximum use of bromine's sanitizing ability.