The specially designed granular copper sulfate crystals will help control most species of algae including filamentous or string algae with very low concentrations of copper sulfate. Each 5-Pound granular copper sulfate comes in a jug with a screw top for safe storage. Due to state regulations, we cannot ship this product to CT, NJ, or NY. Includes (2) 5-Pound Copper Sulfate Granulars.
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