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Duckweed
In Digest V2 #1059, "David W. Webb" <dwebb at ti_com> wrote:
>Although I haven't made the measurements to tell what nutrient is high in a
>duckweed-covered tank, I find that flourishing duckweed generally indicates
>the right conditions for flourishing algae. The nice thing about duckweed
>is that it's a lot easier to harvest than algae. ;-)
It may be easier to harvest, but in my experience its d@mn harder to erradicate!
Ever go away for a week and come home to find a 1 to 1.5" thick layer of
duckweed strangling your tank? <shudder>
-- dj