Blue Wave Tri-Chlor 1" Tablets, Quantity: 10 LBS Brand New Blue Wave 1" Chlorine Tablets (10 Lbs) Pail 1" Chlorine Tablets for your Swimming Pool - 10 lb. Bucket Powerful 90 percent Available Chlorine! Premium stabilized chlorine features U.V. protection to shield it from the suns harmful rays Highest quality, EPA-approved chlorine