[16 IN 1 WATER TEST KIT]  test strips come with 16 main functions, including: PH, mercury, lead, iron, copper, total alkalinity, hardness, nitrite, nitrate, bromine, chlorineFree, Total Chlorine, Fluoride, Chromium/Cr, Carbonate Root, Cyanuric Acid, helps you have a clear mind about the clarity and health of your water. EASY OPERATION]  spa test kit is gentle enough to be equipped with a dropper and dropper.test tube, which would avoid water pollution and make a convenient operation., pond, aquarium, industrial wastewater, etc. SCIENTIFIC WATER TEST STRIPS] specializes in testing and analysis;measuring area for years and adopts the most reliable strips on our products to ensure the accuracy of water quality testing.send your water to the laboratory for testing.It also saves time with convenient use.The strips will expire 3 months after opening. [16 IN 1 WATER TEST KIT] test strips come with 16 main functions, including: PH, mercury, lead, iron, copper, total alkalinity, hardness, nitrite, nitrate, bromine, free chlorine, chlorineTotal, Fluoride, Chromium/Cr, Carbonate Root, Cyanuric Acid, helps you have a clear mind about the clarity and health of your water.[EASY OPERATION] spa test kit is gentle enough to be equipped with a dropper and dropper.test tube, which would avoid water pollution and make a convenient operation., pond, aquarium, industrial wastewater, etc.SCIENTIFIC WATER TEST STRIPS] specializes in testing and analysis;measuring area for years and adopts the most reliable strips on our products to ensure the accuracy of water quality testing.send your water to the laboratory for testing.It also saves time with convenient use.Strips will expire 3 months after opening.