Water testing kits for drinking water is equipped with 16 major parameters which including:total alkalinity/PH/hardness/cyanuric acid/total chlorine/free chlorine/free bromine/nitrate/nitrite/iron/chromium/lead/copper/mercury/fluoride/carbonate root. 1.Dip the well water test kit into water for 2sec and then remove the drinking water test kit. 2. Gently shake off excess water from the strips, hold the water testing kit horizontally for 30sec. 3.Compare the pads to the color chart over 30sec to the results. This water test strips applies to tap water and well water, also pool, spa, hot tub, and aquarium water, Our home water test kit is also a good helper for check water softener. 100 water quality tester mean 100 drinking water tests. You can test it yourself , and water tester for drinking water offer an affordable water testing option at a low cost, so you don't have to spend a fortune to test your water. Drinking water testing with drinking water test strips is a great way to help you improve your water supply easily. Colour: multicolor Material: Paper Package Contents: 3 set x Water Test Kits Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.