Parts List: 1 Bottle of 7 in 1 Water Test Strips (100 strips) 1 x Test Tube 1 x Instruction Manual Highlight description: [7 in 1 Water Test Kit] Aquarium Test Strips capture carbonate root, pH, hardness, total chlorine, free chlorine, nitrates, nitrites in the water for an accurate water quality reading. Test the water quality in your aquarium to see if it is suitable for your fish, so you can take action to prevent fish loss [Quick and Accurate] Immerse the test strip in water for 2 seconds, then remove and hold the strip horizontally for 30 to 60 seconds. Read results by comparing to a colorimetric chart [Premium PVC Material] Each aquarium test strip is made of PVC with no color bleeding mats to ensure instant and reliable results. In addition, the bottle prevents light and airborne water vapor from damaging the strips, prolonging their service life [Widely Used] The aquarium test strips can be widely used in hot tubs, spas, swimming pools, fish tanks, goldfish tanks, ponds and so on. Note: If the liquid to be tested is turbid, please leave it for a period of time and remove the clarified portion for testing after it has been precipitated [After-sales] If you have any questions, please get in touch with us, our service team will provide you with a professional and satisfactory service Detailed description: Name: Aquarium Test Strips Material: PVC Testing time: 30s Shelf life: 2 years Advantage: No interference from VC Storage condition:2℃~30℃ dry place to keep away from light (2℃~8℃ storage is good). After opening, please tighten the lid at any time, the best effect in 3 months. Sample Requirements 1. The liquid under test take a sample of 5-10m1, take the supernatant to do the test after static 2. Test at room temperature about 25 ℃ for the best Test Methods 1. The reaction area of the test strip immersed in the solution to be tested for 1-2 seconds, remove the test strip, put the paper on the top to drain off excess water. 2. After 30 seconds, compare the reaction area of the test strip with the color on the color scale to determine the test value of the solution to be tested. 3. The colorimetric time should be controlled within 60s, too long or too short time will affect the accuracy. Notes 1. Do not touch the reaction end of the test paper when removing the test paper, so as not to contaminate the test paper and affect the test results. 2. After removing the required number of test strips, seal the remaining test strips and keep them away from light. 3. Keep the liquid to be tested colorless or light-colored as much as possible, and use activated charcoal adsorption to do dehydration treatment before testing the dark-colored liquid. If the liquid to be tested is turbid, let it stand for a while, and take the clear part for testing after precipitation. [7 in 1 Water Test Kit] Aquarium Test Strips capture carbonate root, pH, hardness, total chlorine, free chlorine, nitrates, nitrites in the water for an accurate water quality reading. Test the water quality in your aquarium to see if it is suitable for your fish, so you can take action to prevent fish loss [Quick and Accurate] Immerse the test strip in water for 2 seconds, then remove and hold the strip horizontally for 30 to 60 seconds. Read results by comparing to a colorimetric chart [Premium PVC Material] Each aquarium test strip is made of PVC with no color bleeding mats to ensure instant and reliable results. In addition, the bottle prevents light and airborne water vapor from damaging the strips, prolonging their service life [Widely Used] The aquarium test strips can be widely used in hot tubs, spas, swimming pools, fish tanks, goldfish tanks, ponds and so on. Note: If the liquid to be tested is turbid, please leave it for a period of time and remove the clarified portion for testing after it has been precipitated [After-sales] If you have any questions, please get in touch with us, our service team will provide you with a professional and satisfactory service