Keep your pool water perfectly balanced with these professional test strips! The Ueomul 7-in-1 strips check all essential parameters in just 30 seconds: hardness, total alkalinity, cyanuric acid, total chlorine, free chlorine, bromine and pH levels. With 100 strips in the bottle, you have enough for regular testing throughout the swimming season. The large, easy-to-read color chart makes interpreting results simple - no guessing needed. Ideal ranges are clearly marked: hardness 120-425 ppm, alkalinity 80-120 ppm, cyanuric acid 30-100 ppm, chlorine 1-3 ppm, bromine 2-6 ppm, and pH 7.2-7.8. Perfect for pools, spas, hot tubs, and even aquariums. Much simpler than liquid test kits and more reliable than guessing. Test twice weekly to maintain crystal clear, safe water for your family to enjoy all summer long. The strips are individually sealed to maintain accuracy and come with detailed instructions for best results.