Features: Ensures the health of your aquatic life with our Aquarium Test Strips, for any freshwater aquarium or pond owner. These high precise test strips quickly measure water hardness, chlorine, and other vital parameters, delivering reliability result. Perfectly for home users, laboratory technicians, environmental workers, and anyone concerned with water quality monitoring. Suitable for a variety of applications including home tap water testing, swimming pool maintenance, drinking water analysis, and natural water body surveillances. With 50pieces per bottle, our aquarium test strips offer long last peace mind, helping you maintain the perfectly environment for your fish and plant. Specifications: Component:Paper Test Tube Size:Approx.107x12mm/4.21x0.47inch Bottle Size:Approx.95x33mm/3.74x1.29inch Package Includes: 50Piece/Bottle Aquarium Water Test note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.