Re: Aquatic Plants Digest V4 #66

[Gerry Skau <gerry at ans_net>]

>Date: Mon, 31 Jan 2000 08:39:55 -0500
>From: Dinyar Lalkaka <lalkaka at bellatlantic_net>
>Subject: lethal nitrate levels
>
> With 110 ppm of  NO3 my fish should be dead by now,
> shouldn't it?
>
>no, nitrates may not be _good_ for your fish, but they would have to
>accumulate to _very_ high levels (>500 ppm?, > 1000 ppm?) to be lethal to
>most fish, and under normal conditions, some other chemical accumulating
>with nitrate would kill your fish first.
>
>this being said, it's probably true that _some_ spp of fish are
>especially
>sensitive to nitrates, but even these would probably not be killed at
>~100
>ppm for limited periods.
>
>dinyar


You will see problems with high nitrate levels before things get this bad.
Not sure what level it takes to do it, but high nitrate levels will
eventually attack and destroy a fish's eyes.


       Gerry Skau
      
       He has no enemies, but is intensely disliked by his friends.
       -Oscar Wilde

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