Chlorine is the most popular sanitizer for pools, but bromine is the sanitizer of choice for stand-alone spas because bromine is more effective at high water temperatures. Though bromine is quickly depleted in sunlight (about 65 percent of active bromine can be depleted in a couple of hours), it works well in spas because they are typically covered when not in use. A major advantage of bromine is that it can be regenerated. That means spent bromine can be reactivated by adding an oxidizing chemical, such as chlorine or potassium monopersulfate.
Testing Bromine Levels. Test methods for bromine levels are similar to those used for chlorine, except there is no way to distinguish between combined bromine and free available bromine. Therefore, you’ll be measuring total bromine residual. The ideal range of bromine in residential spas is 4 to 6 ppm.
Adjusting Bromine Levels. Bromine is most often sold as slow-dissolving tablets. The tablets can be placed in a floating or in-line dispenser that allows water to pass through and gradually dissolve the tablets, providing a steady supply of hypobromous acid to the spa water. The fastest way to raise the
Mineral purifiers help keep spa water sanitary. As water flows through a mineral purifier containing silver, copper, and zinc, ions are dispersed into the water, where they kill bacteria. Though this technology doesn’t eliminate the need for chemical sanitizers, it can greatly reduce the amount of chemicals you need to add to your spa water.
chamber filled with sanitizing minerals
water flowing into the mineral purifier
water carrying mineral ions that kill bacteria
bromine level is to add a bromine shock, such as chlorine or potassium monopersulfate, which will regenerate the bromine bank.