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Re: CO2 Comments

Your example is not fair because you mention the high concentration 
of nitrates and phosphates. Both of these are components that benefit 
algae more so than plants. Someone posted a study about algae earlier 
on this message board. The conclusion was that phosphate is usually 
the limiting agent in the growth of algae. In other words, 
agricultural phosphate run off will cause it not to be the limiting 
agent and thus algae will be encouraged to grow.

The issue here is not whether or not algae can survive or even grow 
in aerated, moving water but whether it accelerates the growth of 
algae in comparison to the growth of plants. In conclusion, in a well 
maintained aquarium that does not have a excess of nutrients, plants 
will continue to prosper and algae will not overtake plants in 
regions of the tank that have surface aeration/rapid water movement. 
I still maintain my case. (In my opinion)

Menlo Park, CA

>J. Odian wrote:
>>In addition, aerating water does not make algae grow faster. Just
>>take a simple look at nature. Do you ever see algae growing in a fast
>>flowing river? No!
>YES!!!  What makes you think this isnt the case?  Have you ever lived
>downstream of a farm?  I have!  Its amazing what the high
>nitrates/phosphates of scat runoff will do to a pristine river.  Some
>algaes don't like to be bounced about but others are WELL adapted for it.
>Note the morphology of certain algae eaters SAEs for example.  These guys
>EVOLVED in fast streams to lift clinging algae from rocks.
>[Later in his response to my post Dwight wrote:]
>Face it, oxygen is both a sufficient AND a necessary condition for healthy
>plants and algae.  However, surface agitation w/in a Co2 injected aquarium
>is anathema to plants but helps out certain algaes.

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