Aquatic Weed & Algae Control

There is no more cost effective solution to managing nuisance pond weed and algae growth than through the application of EPA-registered and State-permitted aquatic pesticides.


By definition, a weed is "a plant growing out of place"

 Plants can benefit a pond, but they become "weeds" by growing out of control or in areas where they interfere with pond use. An excess of "bad vs. good" plant growth can create a variety of problems including stunted fish populations, mosquito growth, foul odors, unsafe swimming conditions and clogged irrigation pipes that can cost thousands of dollars in repairs and lost ornamentals. Many aquatic weeds are of little value as a food source or habitat structure. Ridding your pond of invasive species allows nature to restore native plants to support the fish and wildlife. The first step in fighting unwanted weed growth in your pond is to identify the type of plants you are dealing with.


Lakes and ponds are threatened by excessive nutrients entering through lawn and garden run-off, wastewater discharges, detergent wastes, septic tank seepage and agricultural run-off.  Excessive nutrients support dynamic growth of aquatic algae, interfering with intended water uses and sometimes presenting health hazards to humans and animals.

"Blooms" of algae, primitive plants with no true leaves, stems or root systems, can lead to a variety of problems:

  • Blue-green algae can cause illness and sometimes fatalities in pets, livestock and wildlife.
  • Exposure to or ingestion of blue-green algae can also lead to a variety of discomforts in humans.
  • Algae contamination can discolor drinking water and create unpleasant odors and tastes.
  • Excessive algae growth can also impart distasteful flavor to fish.
  • Algae decomposition can deplete oxygen in bodies of water and kill fish.
  • Excess algae can impede water intake from fire ponds and irrigation systems.
  • Algae can elevate organic solid content and the biological oxygen demand in wastewater oxidation ponds.
  • Excessive algae growth can quickly change lakes, ponds, lagoons and shorelines from scenic to unsightly.

We absolutely agree that integrated pest management (IPM) techniques and watershed (drainage) best management practices MUST be a part of a comprehensive pond management effort; however, a career's worth of experience has proven that the regular, low-dose application of algicides and herbicides by licensed, certified aquatic professionals is overwhelmingly successful, particularly where budget is limited.