These Tetra EasyStrips Ammonia Aquarium Test Strips provide accurate, fast, and easy results for ammonia in ten seconds - without the need for chemical mixing and glass vials! Ideal for use in both freshwater and saltwater aquariums, EasyStrips are safe, non-toxic, and simple to use. Simply dip the strip into your aquarium water and read the color-coded results in seconds. Featuring the same technology used in medical and scientific laboratories.