- Description AquaChek Pool and Spa Test Strips – Spa 6:1 Tests for: Total Hardness, Total Chlorine, Total Bromine, Free Chlorine, pH, Total Alkalinity Developed specially for spas, AquaChek Spa 6-in-1 gives you a complete look at the water chemistry in your spa or hot tub. Choose Spa 6-in-1 to get a comprehensive understanding of your spa water balance.