Things You'll Need
- Hose
- Dechlorinator
- Water lilies
Instructions
Using the hose, siphon about one-third of the water from your pond.
Refill the pond, making sure that the fresh water is about the same temperature of the water already in the pond.
Add the appropriate amount of dechlorinator. This amount should be specified on the product's packaging and is dependent on the amount of water you replaced.
Scatter water lilies across your pond until they cover about two-thrids of the surface. They will shield much light from reaching the water and also absorb many nutrients the algae would otherwise use to grow and spread. The green algae should gradually vanish within about two weeks.