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Re: Vallisneria vs. Sagittaria


While these apparently do not directly inhibit the growth of the other, is it 
possible that in some aquariums they compete for the same scarce nutrients 
and thus give the appearance being mutually exclusive?

I have one tank with a nice growth of S. sublatta.  It is a constant struggle 
to keep the Kh at an appropriate level without raising the pH excessively.