How to Keep a Pond Algae Free Naturally

Keeping a pond can be a rewarding but difficult task, particularly when it becomes infested with annoying algae. Common in warmer climates, algae can give the sides of ponds a green, slimy, hair-like coat and even tint the water a dense green. Along with the aesthetic disadvantages, algae can also disrupt the balance of your water, potentially harming fish. Fortunately, there's a natural way to keep algae out of your pond that doesn't employ the use of dangerous chemicals.

Things You'll Need

  • Water lilies
  • Shovel
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Instructions

    • 1

      Dig a trough around the perimeter of your pond, about two inches deep.

    • 2

      Plant flowers or other plants within the trough. The trough will capture rainwater, which washes algae-promoting nutrients into your pond, and the plants in the trough will absorb any remaining nutrients.

    • 3

      Scatter water lilies over about two thirds of the pond's surface. These will not only absorb excess nutrients but block sunlight, which also promotes algal growth, from reaching the water.