Re: NANFA-L-- plants and soil

Subject: Re: NANFA-L-- plants and soil
From: Irate Mormon (archimedes at
Date: Fri Oct 01 2004 - 22:38:00 CDT

Quoting "Crail, Todd" <farmertodd at>:

> There are tannins in my system. Is the source the wood? Is the source
> 80lbs of potting soil?

The anwer is, both. I have used soil in a tank without driftwood, and got
tannins. In fact, potting soil contains bark chips and other bits of wood which
leach tannins. And of course, the ability of uncured/uncoated driftwood to do
the same is legendary. Regardless of what kind of light you have, it is obvious
if you have tannin stained water. I live with it, others buy it in a bottle
called "blackwater extract". Most of the streams in south Mississippi are what
I would call blackwater streams. Not muddy, but tannin stained.

Where am I going? And why am I in this handbasket?
/ This is the discussion list of the North American Native Fishes
/ Association (NANFA). Comments made on this list do not necessarily
/ reflect the beliefs or goals of NANFA. For more information about NANFA,
/ visit . Please make sure all posts to nanfa-l are
/ consistent with the guidelines as per
/ To subscribe,
/ unsubscribe, or get help, visit the NANFA email list home page and
/ archive at

: Fri Dec 31 2004 - 11:27:36 CST