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Re: Added Nitrates-Little Happened

Ryan "Cavan" Mills <millsman7 at yahoo_com> sez:
> Anyway Roger, I did add some nitrate of soda to bring
> my nitrates up to about 5ppm.  Nothing yet from the
> Ludwigia.  Some stems are growing normally, but so far
> have not maintained the reddish color.  Others have
> sprouted several bunches of almost microscopic leaves
> near the tops.  I would really like to see this plant
> succeed, because it looks really nice.

Do you think maybe the sodium is building up to toxic levels and
stunting your more sensitive plants?  Why not use nitrate of potash
instead of nitrate of soda?  As an added benefit, you could use less of
that expensive potasium gluconate.