AquaChek Item Number 511244 50 Strips Tests for: Free Chlorine, pH, Total Alkalinity, Cyanuric Acid (Stabilizer). Ideal for customers who use chlorine as the sanitizer in their pool or spa. Includes a test for Cyanuric Acid (Stabilizer), which is especially important for outdoor pools and spas which are subject to chlorine dissipation from UV rays.
