Pure Copper Sulfate for Professional Aquatic Management Copper Sulfate Crystals deliver effective control of algae, aquatic weeds, and microscopic organisms in lakes and ponds. With 99.0% copper sulfate pentahydrate, this proven solution provides reliable results with no water use restrictions when applied at label rates. Key Benefits 99% Pure: Maximum strength copper sulfate pentahydrate Broad-Spectrum: Controls algae, weeds, and certain parasites No Water Restrictions: Safe for swimming, fishing, and irrigation when used as labeled Easy Application: Dissolve in water and spray on surface Temperature Adaptable: Rates adjust based on water conditions Available Sizes 5lb (SKU: CS5) - Ideal for small to medium ponds and spot treatments up to 1 acre. 15lb (SKU: CS15) - Best for medium to large ponds requiring regular maintenance, suitable for 2-5 acres. 50lb (SKU: CS50) - Professional quantity for large lakes, commercial applications, and multiple treatment sites. Does not qualify for free shipping. Application Application rates vary from 0.67 to 5.32 pounds per acre-foot depending on target species. Dissolve crystals in water and spray onto the surface where control is needed. Rates may adjust based on water temperature—consult label for specific dosing. Ideal For Lakes, large ponds, aquaculture operations, irrigation ponds, and golf course water features. Frequently Asked Questions Which size should I choose? 5lb for ponds under 1 acre, 15lb for 2-5 acres or frequent applications, 50lb for large lakes or commercial operations. How much do I need? Rates range from 0.67 to 5.32 pounds per acre-foot depending on target species. Calculate your pond volume and consult the label for specific rates. Is it safe for fish? Yes, when used at label rates. Some species like trout and koi are more sensitive—follow label guidelines carefully. Are there water use restrictions? No, when applied at label rates there are no restrictions for swimming, fishing, or irrigation. How do I apply it? Dissolve crystals in water, then spray the solution onto the water surface. Apply on calm days for best results. How long until I see results? Typically 24-72 hours, depending on water temperature and target species. Does it help with parasites? Yes, it may control certain external parasites in freshwater. Consult an aquaculture specialist for proper dosing.
