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Re: low pH and plant response

John Wheeler wrote:

>What are the dangers of having pH at or below 6.0 for
>extended periods? I'm interested in general plant tank
>"well being" as well as plants' responses to such
>conditions, positive or negative.

I am sure there are plants that perhaps wouldn't do as well at <6 pH for
extended periods.  However, it is my experience that they do fine at
anything from 5.5 - 6.5.  I recommend 6.0 to be safe. Its the fish I have
to watch out for.  http://www.floridadriftwood.com/plantinfo/pH_level.htm
As the chart indicates, pH 5.5 AND pH 6.5 seem to offer the best overall
nutrient uptake rates.

>How about algal response?

No effect as far as I can tell.  If the conditions support plant growth,
they will also support algae growth in equal measure.  

Aquarium Plants & Driftwood