Complete Water Test Kit: The Water Test Kit includes 100 testing strips for 15 parameters, such as lead, pH, iron, copper, hardness, nitrates/nitrites, chlorine, fluorides, and iodine, etc. Extensive Applications: The Water Testing Kit is applicable for the drinking water, aquarium, fish tank, swimming pool and spa, hot tub, well, and tap water, etc. Simple and Accurate: With precise color coordination and high sensitivity, you can get your results quickly and easily with the 15 in 1 Water Test Strips Kit. Easy to Apply: Dip the Drinking Water Test Paper into the water for about 2 seconds, then hold it in the air for about 1 min, and adjust the color of the bottle back to get the reading. Safe and High Water Quality: The Water Test Strips Kit makes it possible for you to detect low levels of impurities, so that you can know what to do to make the water clean and safe.