[ 16 IN 1 WATER TEST KIT] Hofun water test strips is equipped with 16 major function, including: PH, Mercury, Lead, Iron, Copper, Total Alkalinity, Hardness, Nitrite, Nitrate,Bromine, Free Chlorine, Total Chlorine , Fluride, Chromium/Cr,Carbonate Root,Cyanuric acid , covers main influencing factors which pollute your swimming pool ,hot tub or drinking water quality. [ EXTRA ACCESSORIE and EASY OPERATION ] Hofun spa test kit is sweet enough to equip with dropper and test tube, which would avoid water pollution and make a convenient operation. [ WIDE USAGE WATER TEST KIT ] Hofun 16 in 1 water test strips can be applied to a wide range of water inspection, like drinking water, pool, hot tub, spa, pond, aquarium, industrial waste water,etc. [ THE MOST ACCURATE and SCIENTIFIC WATER TEST STRIPS] Hofun specializes in testing and measuring area for years and adopts the most reliable strips on our products to assure the accuracy of testing water quality. [ PERFECT VALUE FOR YOUR MONEY ] - Hofun water testing kits for drinking water is absolutely economic,which will last 6 months if tested 2 times per week.Its also time-saving due to convenient operation.