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RE: Duckweek and nitrogen fixation

> Date: Sat, 8 Nov 1997 00:25:55 -0500 (EST)
> From: TYELLA at aol_com
> Hello all,
>       I may be misremebering, but doesn't duckweed fix atmospheric 
>  If so, it may cause some problems.   I doubt, however, that an aquarium
>  will ever be nitrogen limited, so maybe there will be no problem at all.

I add substantial amounts of KNO3 to my tanks in order to keep the nitrate 
levels at 5+ ppm.  Heavily planted tanks can easily be nitrogen limited.

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to an invitation.  - Jean Shinoda Bolen