WMAS Discussion Forum : Oxygen in the water........ http://www.utahreefs.com/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sat, 20 Jun 2026 15:52:17 +0000 Thu, 15 Jan 2004 13:42:49 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.03 360 www.utahreefs.com/forum/RSS_post_feed.asp?TID=1662 <![CDATA[WMAS Discussion Forum]]> http://www.utahreefs.com/forum/1by1.gif http://www.utahreefs.com/forum/ <![CDATA[Oxygen in the water........ : I understand gas exchange as Jon...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=15145&title=oxygen-in-the-water#15145 Author: tomason
Subject: 1662
Posted: January 15 2004 at 1:42pm

I understand gas exchange as Jon explained it. The rate at which the dissolved gases in the water can reach equilibrium with the atmosphere depends in part on the surface area between the air and the water. Airstones bubbling in the water adds a lot of surface area across which CO2 can be "blown off" and O2 can be absorbed by the water. Water pumps help by increasing the amount of water which contacts the air to exchange gas with the atmosphere.

-Tom]]> Thu, 15 Jan 2004 13:42:49 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=15145&title=oxygen-in-the-water#15145 <![CDATA[Oxygen in the water........ : Suzy wrote:It just came to...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14852&title=oxygen-in-the-water#14852 Author: Adam Blundell
Subject: 1662
Posted: January 11 2004 at 6:06pm

Originally posted by Suzy Suzy wrote:

It just came to me! Osmotic! Though, not a verb, but an adverb...

My proper command of the English language really bemuses me at
times!

Ironic and funny.  Osmotic I believe is an adjective not an adverb, but osmotically is an adverb. 

Adam

]]> Sun, 11 Jan 2004 18:06:31 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14852&title=oxygen-in-the-water#14852 <![CDATA[Oxygen in the water........ : Suzy, if you do, expect a lot...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14851&title=oxygen-in-the-water#14851 Author: jfinch
Subject: 1662
Posted: January 11 2004 at 5:49pm

Suzy, if you do, expect a lot of salt creep where the bubbles surface and break.  That's the drawback.  And I wasn't really advocating there use, just explaining why I think they work.  Do you have a skimmer?  It does essentually the same thing without the creep.

]]> Sun, 11 Jan 2004 17:49:16 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14851&title=oxygen-in-the-water#14851 <![CDATA[Oxygen in the water........ : Hey, that makes sense! Now, I...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14850&title=oxygen-in-the-water#14850 Author: Suzy
Subject: 1662
Posted: January 11 2004 at 5:39pm

Hey, that makes sense! Now, I gotta figure out how to add that to
our set-up!
Thanks, Jon!!]]> Sun, 11 Jan 2004 17:39:10 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14850&title=oxygen-in-the-water#14850 <![CDATA[Oxygen in the water........ : Wecan all agree that gas exchange...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14848&title=oxygen-in-the-water#14848 Author: jfinch
Subject: 1662
Posted: January 11 2004 at 5:20pm

We can all agree that gas exchange occurs at the air and water boundry.  Now think of all those tiny bubbles as little packets of air (which of course they are).  All those little sphere's have lots and lots of surface area.  For example, a 1 inch column of tiny air bubbles located 10 inches below the surface has about the same surface area as the whole top area of a 55 gallon tank.  And all those little bubbles replace themselves every couple seconds!  You still need to move the "exchanged" water away and bring in new "unexchanged" water.]]> Sun, 11 Jan 2004 17:20:19 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14848&title=oxygen-in-the-water#14848 <![CDATA[Oxygen in the water........ : It just came to me! Osmotic! Though,...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14835&title=oxygen-in-the-water#14835 Author: Suzy
Subject: 1662
Posted: January 11 2004 at 3:46pm

It just came to me! Osmotic! Though, not a verb, but an adverb...

Air exchange happens at the water surface as a result of osmotic
action!

My proper command of the English language really bemuses me at
times!]]> Sun, 11 Jan 2004 15:46:09 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14835&title=oxygen-in-the-water#14835 <![CDATA[Oxygen in the water........ : Adam Blundell wrote: One last...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14830&title=oxygen-in-the-water#14830 Author: Marcus
Subject: 1662
Posted: January 11 2004 at 3:23pm

Originally posted by Adam Blundell Adam Blundell wrote:

One last idea.  I believe you are better to simply drop your tank temp from 80 (or whatever it is) to 75.  To me, that makes a big difference.

I agree 100%!  That'll make a big difference.

]]> Sun, 11 Jan 2004 15:23:53 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14830&title=oxygen-in-the-water#14830 <![CDATA[Oxygen in the water........ : Suzy, I don&#039;t know if Osmosis...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14824&title=oxygen-in-the-water#14824 Author: Adam Blundell
Subject: 1662
Posted: January 11 2004 at 2:46pm

Suzy,

I don't know if Osmosis can be a verb.  Never thought about it, but I can't think of an example.  As for the rest of your thoughts on airstones (this post and the other), I agree that is how I too understand them.

Adam

]]> Sun, 11 Jan 2004 14:46:02 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14824&title=oxygen-in-the-water#14824 <![CDATA[Oxygen in the water........ : Hey, I just posted this in a different...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14821&title=oxygen-in-the-water#14821 Author: Suzy
Subject: 1662
Posted: January 11 2004 at 2:07pm

Hey, I just posted this in a different place! In with the good, out
with the bad!

How do you make "osmosis" a verb?

Jon, do you think airbubblers are better than powerheads for air
exchange? I've always thought powerheads are like placing a patient
on a ventilator, a mechanical way of improving his lung function/air
exchange. His lungs can't keep up with the co2 his body is making,
and the mechanical ventilation helps him "blow" it off. And, an
airstone is like putting a patient on a nasal cannula, a little extra o2
which might raise his oxygen level, but really can't help him get rid
of excess co2.

Unless the bubbler was really pulling water up........Wouldn't that
take a whole lot o' bubbles?

]]> Sun, 11 Jan 2004 14:07:53 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14821&title=oxygen-in-the-water#14821 <![CDATA[Oxygen in the water........ : I agree with Adam and Marcus....]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14810&title=oxygen-in-the-water#14810 Author: jfinch
Subject: 1662
Posted: January 11 2004 at 12:17pm

I agree with Adam and Marcus.  Do a search on Henry's Law.  That will explain the freshman chemistry answer behind how/why gasses dissolve into liquids.  Do a search for Fugacity for the graduate level discussion.

(except I dissagree with Adam's comments regarding airstones.  I think they would be great for increasing gas/water exchange)

]]> Sun, 11 Jan 2004 12:17:30 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=1662&PID=14810&title=oxygen-in-the-water#14810