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post #1 of 6 (permalink) Old 08-24-2014, 03:26 AM Thread Starter
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Tank smell

What does it mean if while doing a water change and you sink your gravel vac deep into the substrate and you get an almost rotten egg smell, sometimes even small bubbles when you get to the bottom of the tank? Is this something to be concerned about, will it effect the plants and/or fish?
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post #2 of 6 (permalink) Old 08-24-2014, 04:07 AM
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Sounds like hydrogen sulfide to me... I often get bubbles from my MTS substrate but they don't smell
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post #3 of 6 (permalink) Old 08-24-2014, 04:10 AM
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Anaerobic pocket where matter is decaying. The rotten egg smell is sulphur. I believe the gas is Hydrogen Sulfide. It's harmless to the fish and the plants. How deep is the gravel?
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post #4 of 6 (permalink) Old 08-24-2014, 04:53 AM Thread Starter
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Originally Posted by Icegoalie32 View Post
Anaerobic pocket where matter is decaying. The rotten egg smell is sulphur. I believe the gas is Hydrogen Sulfide. It's harmless to the fish and the plants. How deep is the gravel?
3 to 4 inches, I layered the bottom of the tank with 1/8" of moss so the matter decay makes sense.

So other than smelling bad when I do (not often) strike that deep into the substrate it's nothing to worry about?
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post #5 of 6 (permalink) Old 08-24-2014, 05:32 AM
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Nothing to worry about.
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post #6 of 6 (permalink) Old 08-24-2014, 05:41 AM Thread Starter
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Nothing to worry about.
Glad to hear that, I wasn't looking forward to being told I had to replace my substrate This is my only tank (ATM) and it would not have been easy to deal with
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