1. JINXIU 6-in-1 Pool Test Strips These pool test kits can simultaneously detect the pH, total chlorine, free chlorine, total alkalinity, cyanuric acid, and total hardness of swimming pool or spa water. 2. Easy to Store Pool water quality should be tested once a week. The bottle contains 50 pool and spa test strips and desiccants, so these pool test strips can be conveniently stored. 3. Easy to Use and Read Simply immerse the test strip for hot tubs, swimming pools, or spas in water for 2 seconds, take it out and wait for 60 seconds, then compare the color changes of each color block on the test strip with the color chart on the side of the bottle to obtain accurate water quality test results. 4. Easy to Carry Each test kit suitable for above-ground pools measures 3.75×1.38×1.38 inches and weighs 1.1 ounces, making it very easy to carry anywhere. It is suitable for water quality testing of swimming pools, spas, and hot tubs. 5. Optimal Concentration The recommended ranges for the pool test strips are: total chlorine 0 - 25 ppm, free chlorine 1 - 3 ppm, pH 7.2 - 7.6, total alkalinity 80 - 120 ppm, cyanuric acid 30 - 50 ppm, and total hardness 250 - 500 ppm. 6. Quantity Shipped: 1 piece 7. Product Color: Multicolor 8. Product Size: 3.6×3.6×9.6 cm