Active pool oxygen tester, It analyses very precisely the active oxygen (monopersulfate), ph and total alkalinity of your pool. Oxygen measurement is very important for maintaining the right balance of your water. Advantages: Strips provide reliable, instant, accurate results Essential for pools with active oxygen treatment It will measure active oxygen, pH and total alkalinity Features: Water analysis using strips Number of strips: 50 Result time: 15 sec Function: 3 in 1 Recommended frequency for pool testing: 2 times/week Above - ground, in - ground pools Reference: AQC - 470 - 0011 Tip: In order to obtain a complete diagnosis, test the pool water at both ends and compare the results. For a spa, it is recommended to test the water with Aquachek before each use. Packaging: 1 x Active pool oxygen tester Delivered in its original packaging