Re: [APD] Ammonia and Nitrates

["S. Hieber" <shieber at yahoo_com>]

Lol. Now that's anecdotal humor any way you look at it.

I think the case was presented as a counterexample to a
hypothesis, not as a soundness proof of a general theory,
which I guess is what you're pointing out.


But turning the hand over, I suppose I should pont out that
a few of us *have* used small jars as mini aquaria, growing
out this or that small plant. But that's hardly a
technique, much less a thesis ;-)

sh

--- Vaughn Hopkins <hoppycalif at yahoo_com> wrote:

> I think that experiment proves beyond a doubt that if we
> want to keep 
> water in a jar on a sunny window sill, and don't want
> algae to grow in 
> it, we shouldn't add a large amount of nitrates to the
> water.  I will 
> certainly try to remember that.
> 
> Vaughn H.
> 
> On Friday, December 2, 2005, at 07:55 AM, Brian Waldbaum
> wrote:
> 
> > I read your post on the BarrReport in which you
> described your
> > experiment.
> > I'm still baffled as to why you concluded that
> excessive nitrates cause
> > algae when the jar
> > dosed with NO3 also had 15x the amount of PO4 relative
> to the non-dosed
> > jar.
> >
> > Brian
> >
> >
> > On Dec 2, 2005, at 8:40 AM, Bill D wrote:
> >
> >> Last summer I put two one gallon jars in a sunny
> location.  One
> >> contained
> >> well water which was relatively low on nutrients; the
> other contained
> >> the
> >> same
> >> water plus 60 ppm of NO3.
> >>
> >> After a month the low nutrient jar had almost no algae
> present.  The
> >> glass
> >> of the
> >> higher nutrient jar was covered with algae, so much so
> that some of it
> >> had
> >> to be
> >> scraped off to see the water.
> > (snip)
> >
> >> the purpose of the experiment was
> >> to test
> >> the effect of high nitrate levels on the growth of
> algae, and it did.
> >>
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> >
> 
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