Description:Testing method:1. Immerse the reaction area of the indicator paper in the test solution for 1-2 seconds, remove the indicator paper, and shake out the excess water.2. After 1 minute, compare the reaction zone color of the indicator paper with the color chart color chart to determine the test value of the solution being tested.3. The color comparison time should be controlled for about 1 minute, too long or too short will affect the reading. Water Test Strips Jacuzzi Test Strips Bromine Test Strips Pool Chlorine Test Strips Spa Test Strips Water Hardness Test Home Water Test Kit Jacuzzi pH Strips Pool Test KitNote:1. Do not touch the test area of the reagent strip.2. After removing the test paper, keep the remaining test paper sealed and protected from light.3. Try to have the liquid tested as a colorless or clear test. Specification:Category: Water Quality Test Paper,Specification Model: W-7Quantity: 100 Bar/Tube, You Can Mention Them: 96%Shelf Life: 1 YearCertificate: CE, ISOMattrial: PETCassay Time: 30sAdvantage: Not Affected by VCEtest Materials: PH, Total Alkali, Nitrite, Residual Chlorine, Total Chlorine, Hardness, BromineApplication Scope: suitable for drinking water, aquarium, swimming pool and spa, industrial water, pond, Hot Spring Water Product List:Water Quality Monitoring Test Paper*100