NANFA-L-- Bubbles from the substrate

Subject: NANFA-L-- Bubbles from the substrate
From: Sajjad Lateef (
Date: Sat Dec 25 2004 - 09:39:03 CST

In a 38H, I have a six inch deep substrate (layered gravel,
profile, gravel) topped with 1/2" of accumulated mulm. Of late,
I have been noticing that bubbles are emanating from the
substrate spontaneously (not tiny, plant pearling bubbles;
these are a few, large bubbles).

My guess is that there is anaerobic decomposition going on
in the substrate and the H2S is building up and slowly

The fish are fine. The plants are fine. Should I be doing
something about these bubbles? I would hate to tear-down
and re-setup the tank - it's been going strong for a few years now.



Sajjad Lateef  e-mail: sajjadlateef AT yahoo DOT com

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: Sat Jan 01 2005 - 12:42:04 CST