<p>These high precise test strips quickly measure water hardness, chlorine, and other vital parameters, delivering reliability result.</p> <p>Perfectly for home users, laboratory technicians, environmental workers, and anyone concerned with water quality monitoring.</p> <p>Suitable for a variety of applications including home tap water testing, swimming pool maintenance, drinking water analysis, and natural water body surveillances.</p> <p>With 50 pieces per bottle, our aquarium test strips offer long last peace mind, helping you maintain the perfectly environment for your fish and plant.</p> <p>Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you!</p> <p>Colour:As Shown</p> <p>Material:paper</p> <p>Package Contents:</p> <p>150 * Aquarium Water Test Strips</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>