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Re: Limnobium

Piabinha at aol_com wrote:

> are Limnobium (amazon frogbit) species more difficult to cultivate than water 
> lettuce (Pistia)?  i can't seem to keep any alive.  what does it require?  my 
> Pistia threaten to take over the world and at one time even bloomed but 
> Limnobium just disintegrate.
> btw, what species are available in teh hobby ?  i think i've seen 2, one 
> large and much coarser than the other, but they might have been the same 
> species.
> tsuh yang chen, nyc, USA

I have both a small species in the aquarium and in the garden pond, and a 
giant type in the pond. I'm not sure if they are the same species. IME it
is very demanding of nitrogen levels. I use it as a sure indicator of low
nitrogen. It only thrives when my Tetra NO3 test reads above 10-15 ppm. 
Below that, it turns yellow and withers. It also seems to prefer the warm
and humid environment under the aquarium glass cover than the open air in
the pond.

- Ivo Busko
  Baltimore, MD