Re: [APD] Soil master black/charcoal in Sacramento

[Jerry Baker <jerry at bakerweb_biz>]

Wise, Nicholas wrote:
> Well, one difference would be if the black substrate is naturally black.
> I personally have never seen rocks occuring naturally in day-glo pink or
> the aquamarine you see in pet stores.  The colored gravels are basically
> painted rocks. 

Ah ha. I hadn't thought of it that way. I just was thinking in terms of 
habitat-specific when I was thinking of what constitutes natural (kinda 
like putting sea shells in a goldfish tank). I was under the impression 
that black sand/gravel is of fairly limited occurrence, especially in 
freshwater habitats.

Thanks.

-- 
Jerry Baker
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