[APD] Re: fresh water / nitrates / plant growth

["Tom Wood" <tomwood2 at flash_net>]

> It's my understanding that there are 'super micronutrients' that
> are used in such small amounts that it's impractical to include
> them in trace element mixes. Stuff like Beryliium, which is also
> used to power spaceships when in large spherical form. In a
> closed system like an aquarium they get used up, so water 
> changes
> replenish them. Not sure if that dynamic applies to ponds.

"Just how much beryliium do you think there is in rainwater ? 
:-)"

Welll, it depends on how much volcanic activity there's been 
recently that spews it into the air. Or how much gets picked up 
on a windy day and carried aloft. Or how many beryliium-powered 
alien spaceships burn up on entry into the atmosphere. All of 
which can get washed out of the air by rain.

TW 


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