1.BRAND NEW HIGH QUALITY Our pH and Cl2 tester is made of brand high quality materials to ensure its durability and reliability. It can deliver accurate and consistent results with every application. 2.Recommended chlorine content for pools and spas: Maintaining proper chlorine levels is vital for clean and swimming conditions. The recommended chlorine content is 1.2 to 1.7 ppm to ensure optimal water quality for your pool or spa. 3.Recommended pH for pools and spa: pH is essential for comfortable and y swimming. The recommended pH is 7.2 to 7.8 to ensure your pool or spa water is within the optimal range for a pleasant bathing experience. 4.CONVENIENT WATER TESTER FOR CLEAN BATH FUN With this pH and Cl2 tester, you can easily and quickly determine the current pH and chlorine content of your pool or spa. This ensures clean and water, guaranteeing your and a pleasant bathing experience.