1. You can also check if your water softener is working.;Reliable results in seconds: Three steps are all you need to do. 1. Immerse a strip in water for 2 seconds. 2. Remove it and hold it for 15 seconds.Please do not shake the band without direction. 3. Compare with the color chart.;A cost-effective choice for a healthy life: 100 strips in each bottle help you save a lot of time and money.The tightly closed black bottle can hold test strips in a dark, dry place.No more strips activated before use.;Excellent Customer Service: Our first goal is to provide accurate results to people who lead healthy lives. 16 Way Water Tester: These water quality test strips can test 16 parameters.You know total hardness, free chlorine, iron, copper, lead, nitrates, nitrites, MPS, chlorine, fluoride, cyanuric acid, ammonia chloride, bromine,total alkalinity, carbonate, pH in a single dive.;Wide application: 16 parameters are almost everything you need to know about water.This water quality test kit applies to tap water and fountain water, including swimming pool, spa, hot tub and aquarium water, because the parametersof these strips are also included in our 16 in. water test strips