Airstone or added bubbles? - The Planted Tank Forum
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post #1 of 7 (permalink) Old 10-24-2015, 02:36 PM Thread Starter
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Airstone or added bubbles?

I am wondering who uses airstones or other means of bubbling and why? visual aesthetic? or 02 needed?

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post #2 of 7 (permalink) Old 10-24-2015, 03:49 PM
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Airstones actually do more for water movement than adding o2. The increase in o2 comes from absorbing it across the surface of the water and the column of air bubbles make the water circulate pulling water with less o2 to the surface where it can absorb it from the air. The surface area of all those bubbles is still very tiny compared to the surface area of the tank itself and the bubbles do not stay submerged for very long so the bubbles themselves do not add much o2.

I do not run an airstone but have a very slight surface movement and lots of sub-surface circulation so o2, co2 and nutrients are very well distributed.
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post #3 of 7 (permalink) Old 10-24-2015, 04:58 PM
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I use it for circulation in a small unfiltered shrimp tank. Nice and gentle.

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post #4 of 7 (permalink) Old 10-24-2015, 05:07 PM
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Originally Posted by Daisy Mae View Post
I use it for circulation in a small unfiltered shrimp tank. Nice and gentle.
As do i.
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post #5 of 7 (permalink) Old 10-25-2015, 03:50 AM
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Bubbles can add to aesthetics in certain scapes. A air stone can be useful to add water movement to still spots specially in larger tanks. The bubbles cause agitation to the tank surface and increase the contact surface with air - that enables a greater diffusion of gasses across the air/water contact helping in maintaining the dissolved gas equilibrium.

Other than these, I cannot think of any other purpose for them.

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post #6 of 7 (permalink) Old 10-25-2015, 01:30 PM
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Hello b...

I use small filters in larger tanks because I change out so much tank water every week. I use an air stone as an inexpensive way to add a little O2 to the tank. The air stone is quite a bit less expensive than a larger filter system. One works as well as the other.


"Fear not my child, just change the tank water."
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post #7 of 7 (permalink) Old 10-25-2015, 06:32 PM
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As stated, cheap easy way to move alot of water

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