Hach 2 Bottle Chlorine 4-In-1 Test Kit

AquaChek Chlorine 4-in-1 + Shock Test Strips - 50 CL Strips / 10 Shock Strips per Bottlle Features and Benefits Tests for Free Chlorine, Cyanuric Acid, pH and Total Alkalinity ShockChek results simply indicate whether "yes" the pool or spa needs to be shocked or that the water is "okay" 12 Bottles per Case