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Substrate desiderata

To: Aquatic-Plants at actwin_com
Subject: Substrate desiderata
From: Dave Gomberg <gomberg at wcf_com>
Date: Tue, 09 Feb 1999 08:57:01 -0800
In-Reply-To: <199902090848.DAA20892 at acme_actwin.com>

At 03:48 AM 2/9/99 -0500, James Purchase wrote:
> a good substrate or
>substrate doesn't _have_ to be laterite in order to work well 

This brings up the question of what a substrate SHOULD do.  Dupla laterite
has two important properties (as I read the story):  some abilty to release
iron and a relatively high CEC.  It also tends to cloud the water less than
some other clays.   Does it have any OTHER important properties?   Are
there any other properties we want a substrate to have?

--
Dave Gomberg, San Francisco            mailto:gomberg at wcf_com
http://www.wcf.com/co2iron
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