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RE: random question

> Date: Wed, 4 Mar 1998 21:26:20 EST
> From: D0NxD0N <D0NxD0N at aol_com>
> Subject: random question
> ::yawn:: well the apd has been boring for a while and i just wanted to 
ask a
> random question.  i was talking to someone on aol yesterday and he had
> this to say about having a nitrate of 10 ppm-
> <<<<Also, the nitrate levels in natural eco-systems (be it the Amazon
> River or the tropical reef) are near 0 ppm.  A well-balanced ecological 
system will
> use nearly all of the available nutrients.  Excess nutrients is an 
> of an out of balanced biological system.  10 ppm of nitrate would only be
> found in polluted waters.>>>>
> is this true?? ive heard some people say that zero nitrates in a planted
> tank isnt necessarily a good thing and a nitrate level of 10 ppm or less 
> good for the plants.

Last night I watched a program about nitrate levels in seven freshwater 
springs which combine to form a good sized river in Florida.  As the divers 
swam down this river they reached  point where suddenly the grasses were 
covered in brown algae.  They said it was because at that point the river 
was joined by a spring which was producing water with a high nitrate level, 
a new phenomenon.  "High" in this case was apparently less than 10 ppm.

Here on the list I know people that keep their nitrate levels elevated to 
avoid algae.

Can anyone suggest why nitrate levels which are low (and beneficial) in a 
planted aquarium cause algae problems in this river?

The very act of seeking sets something in motion to meet us;
something in the universe, or in the unconscious responds as if
to an invitation.  - Jean Shinoda Bolen