50pcs 7in1 Water Quality Test Strips PH Nitrate Nitrite Chlorine Alkalinity Hardness for Pool Pond Aquarium Tap Fish for Tank Description: 7 in 1 Upgrade: The test strip can be used for rapid analysis and detection, of Nitrate, Nitrite, pH, Free Chlorine, Total Hardness, Total Alkalinity, Total Chlorine Practical in Use: Wells and pipes or swimming pools can be easily contaminated. It is recommended to use this test strip frequently. Measure your pH accurately to show alkaline status by using the strip. Ensure your body and water are safe. Easy to Use: Immerse the test strip in water for 2 seconds, hold it in the air for about 60 seconds, and then adjust the color on the back of the bottle to get a reading to comfortably test your pH at home. Economical and Applicable: Water quality should be tested weekly. One pack of our test strips includes 50 test strips. It is used for water quality testing of drinking water, household taps, well water, freshwater, fish tanks, swimming pools and more. Portable Design: There are 50 test strips in each bottle. It is compact and easy to carry. Specifications: Bottle material: Plastic Test stripe material: paper Color: as shown in the picture Length: about 11 mm/0.43in Quantity: 50 strips in each bottle Packing List: 50pcs/bottle X PH Test Strips 1pcs X user manual Notes: 1. Due to the light and screen difference, the item's color may be slightly different from that shown in the pictures. 2. Please allow 0.5-2 for cm tolerance due to manual measurement.