Complete hot tub spa maintenance chemical care kit complete with bromine sanitizer. Bromine starter kit uses bromine as the main sanitizer. Never mix chlorine and bromine but select a program that uses either chlorine or bromine as the main sanitizer. Depending on where you live, the water you use to fill your spa may be filled with many minerals and metals which will influence the chemicals needed to maintain proper water chemistry. Spa Breeze strongly recommends taking a water sample to a spa professional to determine the pH, calcium hardness, metals and total alkalinity of your water. Once this test has been completed you are ready to begin filling your spa with water for the first time.