AquaChek Yellow Chlorine 4-Way Pool & Spa Test Strips – 50 Per Bottle by AquaChek

Use AquaChek Yellow Chlorine Swimming Pool/Spa Test Strips so you can say no more vials, reagents and messy drops. Try Aqua Chek’s simple, yet accurate test strips instead of that complicated liquid test kit. Just dip and read the results in 30 seconds. The AquaChek Yellow Chlorine test strips tests for free chlorine, cyanuric acid, pH, and total alkalinity.