Things You'll Need
- Hose
- Water lilies
Instructions
Use a hose to create a siphon in the pond by thrusting it forward and backward underwater, which will begin draining the water.
Drain about one-third of the water from the pond.
Refill the pond with fresh water, making sure that the temperature approximately matches the water already in the pond.
Scatter water lilies over about two-thirds of the surface of the pond. These will block sunlight and absorb nutrients that the algae would otherwise use to propagate.