…below. Failure to maintain proper water chemistry may cause damage to the UltraTemp Heat Pump. Test Recommended Level Free Chlorine 1.0 to 3.0 ppm (3.0 to 5.0 spa) Bromine 2.0 to 4.0 ppm (3.0 to 5.0 spa) pH 7.4 to 7.6 Total Alkalinity (TA) with Calcium, Lithium, and Sodium Hydrochlorite 80 to 100…