AquaDoc Eagle Ray Digital Water Tester eliminates the guesswork of traditional test strips by providing fast, accurate results. Designed for both pools and hot tubs, it measures seven essential water parameters, including chlorine, hardness, alkalinity, bromine, cyanuric acid, and pH. Simply insert a test strip and let the digital reader do the analysis. Easy to use and highly reliable, the Eagle Ray makes water balancing simple and effective for any spa or pool owner.