ClearView Black Algae Killer Granular Tri-Chlor 2 lb 4 Pack | CVTC002

Superchlorination: Swimming pools and spas should be super chlorinated once each 7-10 days when not in use, after rain or dust storms, during hot weather, and whenever water is cloudy or floating algae appears on the water surface. Broadcast 7 1/2 to 15 ounces of this product per 10,000 gallons pool water over the deepest end of the pool. For spas, use 3/8 to 3/4 ounces of this product per 500 gallons. Spread evenly over water surface of spa. 4 Pack