[AGA Member] old soil substrate from a planted tank

[Richard Schiek <rschiek@pobox.com>]

I was redoing a planted tank that had a soil substrate beneath quartz 
gravel.  The old substrate had a rotting smell to it when I removed it. 
 I assume that this is bad, but I was wondering if any of you knew 
better.  I am redoing the tank because nothing will grow in it anymore 
even plants that I've had success with in the past.  The strange part 
was the the roots of many of the plants looked healthy and white.

Any thoughts?

Thanks,

Rich Schiek
 

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