2 LB. QUICK KILL GRANULAR,KILLS BLACK ALGAE ON CONTACT
FOR UNPAINTED PLASTER POOLS ONLY.  
 
Controls algae - kills bacteria.  Completely soluble.  Kills algae on floors and walls in hours.  1 lb. per 15,000 gallons.  Broadcast over algae covered areas in plastered pools only.  99% Trichloro, 89% Available Chlorine.