Gardens Controlling duckweed
do I get rid of irritating duckweed from my pond?
great difficulty! This small floating, light green fern will grow
profusely in ponds and can regenerate with alarming speed from only
one or two small pieces. It will be more of a problem in ponds that
have an excess of nutrients, so sensible stocking, feeding, filtering
and partial water changing will help.
Goldfish will also eat
it, but not as a first choice, so keep them hungry if you have this
problem. Having said all this, it probably is true to say that the
only way to eradicate duckweed is to physically remove it. Net it
off, net it off and net it off again. Repeat this procedure about
500 times and you should be getting there! As you can see, it is
easier to prevent the problem in the first place. If you spot a
few pieces - and it is virtually impossible to keep it out completely
- then remove it while it is still only one or two pieces.
Gardener, Issue 104, 2002, Page 20
Reproduced with permission from the former Weekend Gardener magazine. The views expressed here are not necessarily those of the RNZIH.