[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.

TW 


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