Feature●Test the free chlorine level in water●For freshwater and marine aquarium and aquaculture, Hatchery for aquaculture, water treatment for aquaculture, swimming pool, pond water, ground water, drinking water●can be detectable at 0.1 part per million (ppm) for very chlorine-sensitive applications, for example in shrimp and fish hatchery. It is specially designed for low chlorine concentration between 0.0 – 2.0 ppm for general purpose and also detectable at high concentration up to 8.0 ppm for disinfection and water treatment application●Can measure 250 tests●Easy to use, accurate, fast test, economicDescription Measure the free chlorine level in water samples mainly for aquarium and aquaculture. The water sample can be freshwater and saltwater. This chlorine test kit can be detectable at 0.1 ppm for very chlorine-sensitive applications, for example in shrimp and fish hatchery. It is specially designed for low chlorine concentration between 0.0 – 2 ppm for general purpose and also detectable at high concentration up to 8 ppm for disinfection and water treatment application.