When using Eagle Ray kits, always start by rinsing the test tube or container with pool water to remove any leftover chemicals. Take your water sample from at least a foot below the surface and away from jets or skimmers. Follow the test sequence in this order: chlorine first, then pH, then alkalinity. This prevents chemical interference between tests. Handle your reagents carefully, using clean, dry hands, and avoid cross-contaminating the dropper tips. Time each test step as the instructions say, and read the colors right away under natural light for the most accurate comparison. I keep my pH between 7.4 and 7.6, chlorine between 1 and 3 ppm, and alkalinity in the 80 to 120 ppm range. Testing two to three times a week keeps my water balanced, especially in summer.