HOW TO GET RID OF DUCKWEED – If you spot duckweed in your pond it is a good idea to get rid of it without delay. Left unattended it will quickly take over a garden pond and destroy other plants, such as Water Lilies and starve the pond of oxygen, resulting in killing your fish, if you have them. In the Garden Ponds & Water Features Guide we’ll show you the best ways to get rid of duckweed in your garden pond.
Take a wide blade garden rake and skim the surface of your garden pond to remove the duckweed. Don’t leave the duckweed lying on the ground once you’ve removed it, just bag it up and throw it away.
Trim back trees that overhang a pond. Dead leaves not only clogs up your pond but they provide valuable nutrients that duckweed loves to feed on. This is one of the major causes of duckweed in a pond and simply by cutting back any branches and removing any dead leaves in your pond will certainly help.
Fit a spray water fountain in your garden pond. This will aerate the water and keeps the surface of the pond moving, which makes it difficult for duckweed to grow on.
If you have fish in your pond then try adding some Koi Carp – Koi Carp will feed on Duckweed and help keep the problem down. Note that Koi Carp can be really expensive and do require, along with any other fish you keep, care and attention to remain healthy – having fish in a garden pond really does add to the amount of work it take to keep it all in good order.
There are specialist herbicides on the market but use these with caution, especially if you have fish. Ask your local Garden Nursery about these product and always follow the manufacturers guidelines and recommended use.