1. Quick water quality testing: Simple to operate, allowing you to easily maintain your swimming pool. - Take out the test strip, immerse it in water for about 2 seconds, and then remove it. - After 30 seconds, you can check the results using the color - card on the container. 2. 7 - in - 1 comprehensive test: Measured values include total water hardness, free chlorine, bromine, total chlorine, cyanuric acid (stabilizer), total alkalinity, and pH value. 3. Cost - saving: 100 test strips mean 100 tests. Test strips are an affordable option for water quality testing. You can quickly test water quality without spending a large amount of money. 4. Wide application: Pool test strips are suitable for drinking water, swimming pools, spas, hot tubs, ponds, etc., to determine if the water is healthy and clean. 5. Easy to purchase: There are a total of 100 test strips. The test strips are stored in a sealed container to prevent moisture, ensuring long - term storage and use. Important note: Store the test strips in a cool, dry place away from water to ensure their freshness and service life. 6. The best home pool test strips for your swimming pool and spa. Test 7 parameters: total hardness, total chlorine, bromine, free chlorine, pH, cyanuric acid (stabilizer), and total alkalinity. 7. Extremely easy - to - use pool water quality test strips. Obtain reliable results quickly through simple and clear instructions. Just immerse the strip and compare it with the large color - card on the bottle. The ideal range is marked on the bottle. 8. Comes with a free mobile app - Record, track, and monitor your pool test strip results with extremely high precision. Compatible with iOS and Android. 9. 100 test strips for 100 tests - Each pool test strip can provide accurate and quick results for any water source, including fresh - water and salt - water pools, spas, and hot tubs. 10. Safe, clean, and clear water. Our pool and spa test strips come with an excellent e - book that explains what your results mean and how to keep the water healthy and clean throughout the year.