Granular Chlorine for killing the toughest Algae. A fast-dissolving granular, stabilized tri-chlor chlorine compound providing over 90% available chlorine. Used for the worse cases of black and mustard algae. Caution Tri-Chlor Black Algae Kill is extremely strong. Do no let sit on the bottom of liner pools or colored Pools or you may bleach them out.
All Clear Professional Pool Chemicals Tri-Chlor Algae Kill. The strongest blend of stabilzied granular chlorine available! 99% ACTIVE INGREDIENTS - no calcium residue to scale walls or cause cloudiness like cheaper calcium hypochlorite based products. ALSO WORKS GREAT FOR SUPERCHLORINATION!