Keep pool and spa water balanced with this combined tester and chloralkalinity kit. It measures pH and chlorine and helps you maintain chloralkalinity to stay within safe limits, reducing the risk of equipment corrosion. Why you need it: An unbalanced pool can corrode ladders, pumps and other gear. This tool helps you keep water chemistry in check. Clear, reliable readings: Large screen display shows pH and chlorine results clearly and accurately. Safe, proven ranges: Chlorine 1.2–1.7 ppm; pH 7.2–7.8. What's included: Chloralkalinity testing capability combined with pH and chlorine testing in one kit. Practical design: Compact, portable, and durable for home use or onsite service. Wide compatibility: Suitable for residential pools and spas, hot tubs and similar applications. Use scenarios: Weekly maintenance for a home pool to prevent drift and equipment wear. Spa or hot tub balancing after use to maintain comfort and safety. Seasonal pool opening or closing checks to ensure safe startup or shutdown. This professional, straightforward tool supports accurate testing and easy adjustments, helping you keep water within safe limits without guesswork.