Our 7 in 1 Pool Test Kit offers a simple yet accurate solution for testing 7 key water parameters in swimming pools, spas, aquariums, and fish tanks. Effortlessly measure pH, Total Alkalinity, GH (Hardness), CYA (Cyanuric Acid), Total Chlorine, Free Chlorine, and Bromine. Perfect for both residential and professional use, it ensures comprehensive water quality monitoring for safe and clean environments. QUICK & EASY TO USE: Follow the intuitive, non-technical instructions with clear pictograms—no expertise needed! Simply add 1 drop of water into each test hole, wait 15 seconds, then compare with the color chart. Get reliable results in seconds, making water testing a breeze for everyone. EXPERT STANDARD: Engineered to meet professional industry standards, this test kit guarantees accurate results. Monitor 7 vital water parameters regularly to maintain optimal water quality, ensuring your pool, spa, or aquatic habitats remain safe and well-protected. BUILT TO LAST: Crafted with durable materials, this test kit withstands multiple uses. With sufficient testing capacity for regular checks, it's ideal for in-ground pools, above-ground pools, hot tubs, spas, aquariums, and fish tanks. Reliable for season-after-season use, ensuring long-term water quality management. Color: White Material: Plastic Package Contents: 5 x Water Test Cardboard 1 x Test Tube 1 x Color Comparison Chart 1 x Dropper Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. The measurement allowed error is +/- 1-3 cm.