Features: - The test strip is used for rapid analysis (PH value, total alkalinity, hardness, nitrate, nitrite, bromine, total chlorine). - Immerse the test strip in water for 5 seconds, hold it in the air for about 30 seconds, and then adjust the color on the back of the bottle to get a reading to comfortably test your pH at home. - Water quality should be tested weekly. One pack of our test strips includes 50 test strips. And the test strip is used for water quality testing of drinking water, household taps, well water, fish tanks, swimming pools and more. - Wells and pipes or swimming pools can be easily contaminated. It is recommended to use this test strip to test the water quality frequently. Measure your pH accurately to show alkaline status to ensure your body and water are safe. Specifications: Material: PET Test time: 60s Shelf life: 2 years Advantages: ability to resist VC interference Test items: PH, total alkali, nitrite, residual chlorine, total chlorine, hardness, bromine Scope of application: suitable for drinking water, aquarium, swimming pool and spa, industrial water, pond, hot spring water Package Included: 50* Water Quality Test Strips Notes: 1. Manual measuring, please allow 1 ~ 3mm error, thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture.