Durable pH indicator solution with high-quality ingredients and robust construction designed to last. Its resilient design supports prolonged and continuous use, making it suitable for laboratory test environments that require reliable, sustainable performance. Practical test tool for aquariums: provides accurate pH indication to help maintain optimal water conditions and stable aquatic life. Convenient use: simply immerse the tester in water and wait briefly for the result; easy for beginners and efficient for experienced users. Versatile pH test solution: applicable across diverse water environments, widely used for both freshwater and saltwater aquariums. Use scenarios - Routine pH monitoring during maintenance of freshwater aquariums. - pH tracking in saltwater or reef aquariums to sustain stable conditions. - Laboratory or classroom water quality testing where reliable pH indication is needed.