Durvet AquaVet Copper Sulfate 5 lb. Catalog Lawn & Garden Lawn & Plant Care Pond Treatment & Algae Control Durvet AquaVet Copper Sulfate 5 lb. Manufacturer : Durvet Animal Health Care Description Treatment for killing floating, submerged and planktonic algae in ponds and lakes. 2.5 to 4 pounds of granules treat up to 1 acre. 100% safe for water use immediately. Rates Please contact us for current pricing and availability.