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. Color: White Material: paper The actual object may have color difference due to different light or display Package Contents: 50 Piece/Bottle Aquarium Water Test 1 x Test tube Only the above package content, other products are not included. 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.