Blue Horizons 3 Way + Chlorine Bromine Test Strips for Hot Tub Pool or Spa PH TA
Test for Free Chlorine and Total Bromine Level, Total Alkalinity and PH level. How do i know the optimal water levels for my spa?. For Free Chlorine, it is between 3-5 parts per million (PPM) for a hot tub and 1-3ppm for a swimming pool.