[APD] Too much CO2?

[Derek Parr <derekparr at earthlink_net>]

IS there such a thing as too much CO2?

Provided the fish don't appear to mind, is there any other danger in 
having a CO2 level greater than 40 ppm or more?   Yes, I remember it was 
stated before that most or all plants have no use for more than 30 or 
so, but is there any danger to the plants in having too much?  and what 
is that level?  And is there any danger to the animals other than the 
possible lack of oxygen?

The reason I ask is due to my present experimentation with DIY yeast CO2 
generation which has resulted in several large CO2 spikes and valleys. 
That,  and curiousity.

thanks for the great list,
   -derek


   ............................................................
   derek parr                          http://www.derekparr.com


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