[APD] RE: Acidity and nutrient uptake

["Thomas Barr" <tcbiii at earthlink_net>]

> Message: 13
> Date: Sat, 5 Feb 2005 10:58:25 -0500
> From: "Ed Hengel" <ed-hengel at rcn_com>
> Subject: [APD] Acidity and nutrient uptake
> To: <Aquatic-Plants at actwin_com>
>
> Does anyone have any information about Acidity and nutrient uptake.
> Specifically, does very low ph < 4.5 ( co2 ~ 25ppm, KH ~1) have an effect
on
> plant/algae metabolism?
>
> Ed Hengel
> Carmel, NY

I do not think there is anything specific on pH 4.5 and CO2 at 25ppm.
CO2 obviously changes the uptake characters. Trace metals can become more
toxic to fish.

Plants/algae have the ability to modify and change their internal
environment to maintain homeostasis, so they can adapt to a wide range of
environmental conditions. 
Diatoms are often present in lower pH waters in nature and some BGA's. 
You'll still get nasty algae in high or low pH waters. If plants can grow,
you can bet so can algae.
Generally plants and algae prefer higher pH's, harder waters. They have
more nutrients and carbon. 
I think you'll need to ask what in particular about Plant/lagae metabolism
will be influenced by the low pH and the high CO2 (which are certainly
related).  
Why the low pH and KH? 
 
Regards, 
Tom Barr

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