Massive air build up in dirted tank - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 05-17-2018, 07:20 PM Thread Starter
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Massive air build up in dirted tank

I have so much air in my substrate it is causing massive air bubble mounds. Which means a lot of loose substrate, it's pushing around some of my plants.

All plants are growing well. I turned off all add air injections, stone and CO2. I still have quite a bit of air. I just pushed a good chunk out for the second time, though it was considerable and I expect it to return. What is my best best to resolve this? Is it due to not mixing the dirted substrate enough when initially flooded the tank? I don't ever remember reading about this when I did my initial research in dirted tanks.

Thanks for the help.

I've jumped into the deep end. ( 1st planted tank flooded 4-15-18 ) - Dirted with sand cap - Very messy when water was added.
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post #2 of 8 (permalink) Old 05-17-2018, 07:26 PM
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You're getting gas buildup being produced by anaerobic bacteria, not unusual really. The amount might be, sounds like you're getting a LOT! I'd recommend adding a bunch of Malaysian trumpet snails to keep the substrate moving around, help break up those pockets.

Do these bubbles smell when they breach the surface? It's possibly hydrogen sulfide buildup which is toxic and smells pretty bad.

How long has the tank been setup?
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post #3 of 8 (permalink) Old 05-17-2018, 07:30 PM
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Originally Posted by mgeorges View Post
You're getting gas buildup being produced by anaerobic bacteria, not unusual really. The amount might be, sounds like you're getting a LOT! I'd recommend adding a bunch of Malaysian trumpet snails to keep the substrate moving around, help break up those pockets.

Do these bubbles smell when they breach the surface? It's possibly hydrogen sulfide buildup which is toxic and smells pretty bad.

How long has the tank been setup?

Was thinking along same lines.. Some anaerobic activity is fine even healthy but too much is wayy too much. another question is HOW DEEP is your SOIL ?
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post #4 of 8 (permalink) Old 05-17-2018, 07:42 PM
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Consider me a third for this thought. I once wiped out almost an entire tank of RCS with that stuff. Not too hard to keep in check once you know about it, though. Classic "Ounce of prevention/pound of cure" situation.
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post #5 of 8 (permalink) Old 05-17-2018, 07:47 PM Thread Starter
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LOL, I picked up 10 Mal trumpets just before I started seeing a lot of the activity. I have started to see a few babies as well so perhaps the will help as more appear.

I would say the dirted part is a couple of inches at most then black sand, approx inch or so, less in certain areas because of blooms that have thoroughly disrupted the substrate. I will add that I am considering pulling all of the plants rocks etc and finishing what the bubbles have started and mix up the sub sand/dirt and recap with a couple inches of sand.

I may have more dirt than needed but i would not think much more, how long does this process usually last or is this a, while the soiil is bio-degrading this will happen, scenario?

What is being released, one place I read was CO2, though I was thinking the plants were potentially part of the problem by them generating O2.

thanks for the feedback.

I've jumped into the deep end. ( 1st planted tank flooded 4-15-18 ) - Dirted with sand cap - Very messy when water was added.
75 Gal, Fresh Fluval Plant 48" Bluetooth. Co2
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post #6 of 8 (permalink) Old 05-17-2018, 07:55 PM
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Originally Posted by Rem-airem View Post
I have so much air in my substrate it is causing massive air bubble mounds. Which means a lot of loose substrate, it's pushing around some of my plants.

All plants are growing well. I turned off all add air injections, stone and CO2. I still have quite a bit of air. I just pushed a good chunk out for the second time, though it was considerable and I expect it to return. What is my best best to resolve this? Is it due to not mixing the dirted substrate enough when initially flooded the tank? I don't ever remember reading about this when I did my initial research in dirted tanks.

Thanks for the help.

If it doesn't smell (though you can go nose blind to H2S) you might want to consider yourself somewhat lucky.
Usually will mean anaerobic bacteria in the soil is converting Nitrates to Nitrogen gas.. A "good" thing..



Your injections are not causing this.. well unless you have an under gravel filter..
That's my 2 cents.

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post #7 of 8 (permalink) Old 05-17-2018, 07:57 PM
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Sound like too much soil and not enough cap.
Seems to new to have developed hydrogen sulfide.

Have capped soil that is over 1 year old and it still releases bubbles during lights on time.

Typical soil 1" deep with a cap at least 1-1.5"


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Growing is not that difficult.
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post #8 of 8 (permalink) Old 05-17-2018, 08:51 PM
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too deep of a soil layer.. and possibly soil that was too "fresh" but definitely too deep.
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