Re: tannic acid in powdered form

[Marco Lacerda <marcolacerda@ax.apc.org>]

> I've never heard of this before.  If it exists, who makes it and where can a
> person get it?
> 
> G. Kadar

I buy it in Brazil, in a company based in Sao Paulo, but they import it 
from overseas, probably from USA or Germany.
I suggest you check it with a Chemical comapany in US, it shouldn't be 
difficult to find it.
Some Apisto books (if I'm not wrong Koslowski's book) suggest that good 
acid water can be prepared with a combination of tanic acid (mostly for 
brown color, as it is a "weak" acid and does not drop much pH values) 
and HCl. But unfortunately no quantities are given, neither by Römer or 
in the aquarium booksŠ



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