Easy-to-read strips test spa water pH, total alkalinity, calcium hardness and bromine or chlorine levels.
Spa & Hot Tub Test Strips Easy-to-read strips test spa water pH, total alkalinity, calcium hardness and bromine or chlorine levels. Features: Fast Easy Accurate Applications: Normal: Dip strip in water one time. Compare test results to chart on back of bottle. Tips: Low calcium hardness levels can cause foam and corrosive water conditions, so use a strip that includes the calcium hardness test. Compatible With: Chlorine, bromine and ozone sanitizers.