Captain® Liquid Copper Algaecide – Fast & Effective Algae Control for Ponds and Lakes
Tackle tough algae problems with Captain Liquid Copper Algaecide, a professional-grade solution trusted by pond owners, lake managers, and golf courses. Whether you’re dealing with filamentous algae mats or green planktonic blooms, Captain works fast to clear the water and restore your pond’s beauty.
Formulated with a chelating agent for enhanced copper stability, this powerful algaecide targets and controls a broad spectrum of algae without binding to sediment—making it highly effective where you need it most.
Fast-acting results on a wide range of algae types
Chelated copper stays in solution longer for maximum effectiveness
Ideal for use in ponds, lakes, reservoirs, canals, and more
Trusted by professionals for over 30 years
Captain can treat the following aquatic weeds – Filamentous Algae, Muskgrass, Chara, Blue-Green Algae and Planktonic Algae.
Not recommended for ponds with Koi or Trout. If you have sensitive fish species, we suggest using our all-natural alternative: Rush™ Pond Treatment – safe, effective, and fish-friendly.
Have questions? Call us anytime at 877-948-0303 – we’re here to help.
This product cannot ship via:
USPS First-Class Mail
UPS 2nd Day Air, Next Day Air, or 3 Day Select
FedEx Express Saver, 2Day, or Overnight
Not available to ship to the following states:
Alaska, California, Connecticut, Maine, New Jersey, New York, Washington
Apply Captain algaecide anytime algae is present. Apply Captain at a rate of 1 to 2 gallons per surface acre. When determining the amount of Captain to use, consider only the area that is covered in algae. Mix 32 ounces Captain with 2 1/2 gallons of water, spray onto only 1/2 to 1/3 of the surface area of the pond at a time. Treating all algae across the entire surface area at one time can cause oxygen depletion and result in harm to your fish. For severe algae infestations, limit treatment to 1/3 of the water surface when the water temperature is between 65°F and 85°F. The remaining two 1/3 fractions of the body of water should be treated at 7 day intervals.
Captain is a total pond algaecide that’s most effective when it is applied in bright, early morning sunlight under calm conditions when water temperature is at least 60°F. Apply at the first sign of an algae bloom, if possible. Algae control will occur in 3 to 7 days following application. Larger mats should be broken apart before treatment with high pressure water or a flat tool. Retreat when regrowth appears.
See label for complete use directions.
| Weight | 11.5 lbs |
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