Bubbles from substrate

CBWMN

AC Members
Oct 11, 2007
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El Paso, TX
Hey all,
I have a 46G with 6 DD black angels and 2 ABN.
It's planted with Ludwigia Repens, Swords, and crypts.
I DIY CO2, 2+ WPG. Substrate is 1/2-5/8" stones.
The plants are pearling.
But occasionally I see a “burp” of large bubbles coming from the back of the tank.

I gravel vac the open area and change 40-50% water every other day.

I don’t think these bubble bursts could be H2S but maybe so.
I did not smell any “rotten egg” odor in the tank at all.
I’ve stirred the area where the bubbles come from and got a few more.

Anyone guess if these bubbles are hydrogen sulfide?

TIA
Charles
:huh:
 
If it doesn't smell I wouldn't worry to much. H2S smells pretty bad. If you had some I am pretty sure you would smell it.
 
I'll start stiringit. I usually just vac teh open area and leave the substrate in the back alone. I didn't want to disturb the rooted plants.

Charles
 
12 V man
U may be right. I store water in heavy duty gallon jugs
(28 of them). After I siphon 14-16 gallons, I pour temperature corrected water into the tank. Since the tank is kinda heavily planted, I was wondering if the bubbles were collecting under an amazon leaf.
I'm afraid of a python. Somehting about adding Prime to the tank and then adding untreated water scares me. Also adjusting the water temp would be tricky, with the jugs I just put them into the bathtub with warm water.

Thank you
Charles
 
If you have organic matter beneath the gravel you will get some gas buildup, mostly CO2, from the bacterial decay. I get this in my planted tanks, which have a layer of leaves and soil beneath the gravel.
 
Naw, I just watched very closely. It's only O2 from the pearling plants building up under an Amazon leaf till it "burps"

Thanks all,
Charles
 
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