Subject: Re: NANFA-L-- Bubbles from the substrate
From: Sajjad Lateef (sajjadlateef-in-yahoo.com)
Date: Tue Dec 28 2004 - 08:38:06 CST
Date: Sun, 26 Dec 2004 23:14:08 -0500
From: "Todd D. Crail" <tcrail-in-UTNet.UToledo.Edu>
Subject: Re: NANFA-L-- Bubbles from the substrate
- ----- Original Message -----
From: "Sajjad Lateef" <sajjadlateef-in-yahoo.com>
My guess is that there is anaerobic decomposition going on
in the substrate and the H2S is building up and slowly
releasing.
Hi Sajjad,
It could be a lot of gasses. It could be CO2 released from the
respiration of the biofilms processing the mulm (the films trap
the CO2 until it can overcome the surface tension). It could be
methane released by autotrophs in the same films.
Or yeah, it could be sulfides.
In my book, if you can't smell it, it's not a problem,
I stirred up the substrate with a stick and there were a whole
lot more bubbles that were released. The odorless gas is niether
H2S nor CH4. I am now thinking that it is likely C02.
The only new thing I can think of is that my house water supply
is now being softened with NaCl instead of KCl. That must have
activated some microbes into processing the mulm.
It's not high nitrates (the fish are active). But, I'll do another
large water change.
Sajjad
=====
-- Sajjad Lateef e-mail: sajjadlateef AT yahoo DOT com Chicago__________________________________ Do you Yahoo!? Send a seasonal email greeting and help others. Do good. http://celebrity.mail.yahoo.com /----------------------------------------------------------------------- / 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 http://www.nanfa.org . Please make sure all posts to nanfa-l are / consistent with the guidelines as per / http://www.nanfa.org/archive/nanfa/guidelines.html. To subscribe, / unsubscribe, or get help, visit the NANFA email list home page and / archive-in-http://www.nanfa.org/archive/nanfa/.
: Sat Jan 01 2005 - 12:42:07 CST