[16 IN 1 WATER TEST KIT] Hofun test strips come with 16 main functions including: PH, Mercury, Lead, Iron, Copper, Total Alkalinity, Hardness, Nitrite, Nitrate, Bromine, Free Chlorine, Total Chlorine, Fluoride, Chromium/Cr, Carbonate Root, Cyanuric Acid, Helps you have a clear mind on the clarity and health of your water. EASY OPERATION] The Hofun spa test kit is gentle enough to be equipped with a dropper and a dropper. test tube, which would avoid water pollution and make operation convenient. , pond, aquarium, industrial sewage, etc. SCIENTIFIC WATER TEST STRIPS] Hofun specializes in testing and analysis; measurement area for years and adopts the most reliable tapes on our products to ensure the accuracy of water quality test. send your water to the lab to be tested. It also saves time with convenient operation. Bands will expire 3 months after opening.