- AquaChek Yellow tests your pool water for Free Chlorine, Total Alkalinity, Cyanuric Acid (Stabilizer) & pH levels.
- AquaChek Test Strips are manufactured by the industry leader: Environmental Test Systems (ETS).
- Simple, fast, and accurate! Get your result in only 15 seconds.
- Easy to use! Simply dip the test strip into the water.
- 50 Test Strips per bottle.