CCH Calcium Hypochlorite Cal-Hypo 2 5/8" Tablets 50 pound bucket Round, 2-5/8 inch tablets colored blue for easy identification and to differentiate them from other chemical tablets that might be stored at the same facility Contains no cyanuric acid Contains 68% Calcium hypochlorite Designed for use with the CCH Cal-Hypo Feeder, this tablet is 68% calcium hypochlorite and cyanuric acid-free so there is never any danger of over stabilization Due to Haz Mat Regulations These are NOT RETURNABLE