An owner or operator of a public pool or spa shall ensure that a disinfectant or combination of disinfectants is added to the water automatically through an approved chemical feeder to maintain continuously a residual level as specified below: Free chlorine shall be between: 1.5 ppm and 10.0 ppm in pools for swimming and diving and water recreational attractions; 3.0 ppm and 10.0 ppm in pools for wading or therapy; and 4.0 ppm and 10.0 ppm in spas; The maximum amount of combined chlorine shall be 0.2 ppm for all pools and spas; Total bromine shall be between: 3.0 ppm and 8.0 ppm in pools for swimming and diving and water recreational attractions; and 4.0 ppm and 8.0 ppm in spas and in pools for wading or therapy; For pools and spas using copper and silver ions as a secondary disinfectant in conjunction with chlorine or bromine as a primary disinfectant: Copper ions shall be between 0.2 ppm and 1.0 ppm; Silver ions may not exceed 0.05 ppm; Free chlorine in combination with copper and silver ions shall be between: 0.5 ppm and 10 ppm in pools for swimming and diving and water recreational attractions; and 1.5 ppm and 10.0 ppm in spas and in a pool for wading or therapy; and Total bromine in combination with copper and silver ions shall be between: 1.0 ppm and 8.0 ppm in pools for swimming and diving and water recreational attractions; and 3.0 ppm and 8.0 ppm in spas and pools for wading or therapy; For pools and spas using an ozone generator, the maximum amount of ozone measured 2 inches above the water surface shall be 0.1 ppm; For pools using PHMB, the minimum level of PHMB shall be 30 ppm; and For pools and spas using an ultraviolet light/hydrogen peroxide system, the minimum level of hydrogen peroxide shall be 20 ppm. An owner or operator shall ensure that for public pools and spas using cyanuric acid or a similar chlorine stabilizer, the cyanuric acid is maintained between 30 ppm and 100 ppm. An owner or operator of a public pool or spa may not use: PHMB in a pool or spa that uses jets or sprays; PHMB in conjunction with any halogen compound or ozone; Cyanuric acid in conjunction with a bromine compound or in an indoor pool or spa; or An ultraviolet light/hydrogen peroxide system in conjunction with a diatomaceous earth filter.