Pool shock chlorine tester, It will determine the condition of your water and if necessary shock it to regenerate it. It will help you prevent the appearance of green or cloudy water. Advantages: Strips provide reliable, instant, accurate results Essential for the swimming pool It will measure total chlorine and free chlorine It tells you if your water needs shock treatment Features: Water analysis using strips Number of strips: 50 Result time: 15 sec Recommended frequency for pool testing: 1 to 2 times a week (season) Above - ground, in - ground pools Reference: AQC - 470 - 0034 Tip: In order to obtain a complete diagnosis, test the pool water at both ends and compare the results. Packaging: 1 x Pool shock chlorine tester Delivered in its original packaging