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RyanR. 02-17-2013 08:31 PM

New CO2 diffusion method
 
Has anyone ever thought of creating a CO2 diffuser made of a long tube coiled around where you have bubbles flowing up the coils and the water flowing down? It seems as if you could achieve 100% diffusion pretty easily. Any thoughts? Anybody ever tried this?

Sugardaddy1979 02-17-2013 09:06 PM

How would you keep water from flowing back to the co2 source? I don't know that you can have lines under pressure running against eacother.

discgo 02-17-2013 10:27 PM

Maybe just tee the co2 in and use a check valve

Rich Guano 02-17-2013 11:00 PM

2 Attachment(s)
Here I used a Marinland MaxiJet Powerhead with its output connected to the top of a gravel vacuum tube with the water flow moving downward. I let the output of my CO2 just bubble up from the bottom of the vacuum tube without a diffuser. The CO2 is forced to remain in the vacuum tube constantly rising in the downward flow of water until it completely disolves.
Basically its a modified Bell Method, only with water movement.
And yes, a oneway is used in the CO2 line. But be sure its CO2 rated. Metals will corrode very quick.

Not my design, more info here...

http://www.qsl.net/w2wdx/aquaria/diyco2.html

Rich Guano 02-17-2013 11:05 PM

Here is a youtube video that demonstrates the method using a soda bottle rather than the vacuum tube.


RyanR. 02-18-2013 04:22 AM

Those are also very effective ways to diffuse CO2, however, I am trying to avoid as much bulk and equipment in my aquarium as possible.

And bulldog that is a good question perhaps if i make the hole the co2 is pushed out of the air pressure will be enough to keep the water out.

Thanks for your comments and keep em comming!

Rich Guano 02-18-2013 10:30 AM

Quote:

Originally Posted by RyanR. (Post 2574218)
trying to avoid as much bulk and equipment

How about this?


mrkookm 02-18-2013 11:26 AM

New CO2 diffusion method
 
Quote:

Originally Posted by RyanR. (Post 2569802)
Has anyone ever thought of creating a CO2 diffuser made of a long tube coiled around where you have bubbles flowing up the coils and the water flowing down? It seems as if you could achieve 100% diffusion pretty easily. Any thoughts? Anybody ever tried this?

That's a an old concept if you ask me as reactors of the past and even some today employ a similar concept, albeit different design.

I can tell you from my experience effective diffusion is when your design allows for an area where water and Co2 is mixed vigorously while having the least amount of micro bubbles escape you chamber. Don't get me wrong bubbles are good, but for aesthetic reasons the less the better.



from my iP 5 via Tapa.

RyanR. 02-19-2013 01:18 AM

Quote:

Originally Posted by mrkookm (Post 2575490)
That's a an old concept if you ask me as reactors of the past and even some today employ a similar concept, albeit different design.

I can tell you from my experience effective diffusion is when your design allows for an area where water and Co2 is mixed vigorously while having the least amount of micro bubbles escape you chamber. Don't get me wrong bubbles are good, but for aesthetic reasons the less the better.

So do you think it would work with good efficiency? I do have a sump area i may be able to do one of the videos above. I just want my aquarium to look as clean as possible

AirstoND 02-19-2013 02:18 AM

mmmm....7UP

mrkookm 02-19-2013 01:29 PM

Quote:

Originally Posted by RyanR. (Post 2582610)
So do you think it would work with good efficiency? I do have a sump area i may be able to do one of the videos above. I just want my aquarium to look as clean as possible

With a sump you would be better off making a traditional reactor or mist, both of which will not be exposed. Either of the 2 can get the Co2 levels quick enough and maintain it since you will outgass constantly.

What you are suggesting/thinking is going to cause problems for if you want to grow healthy plants and without algae drama later on.

RyanR. 02-21-2013 03:30 AM

Quote:

Originally Posted by mrkookm (Post 2585698)
With a sump you would be better off making a traditional reactor or mist, both of which will not be exposed. Either of the 2 can get the Co2 levels quick enough and maintain it since you will outgass constantly.

What you are suggesting/thinking is going to cause problems for if you want to grow healthy plants and without algae drama later on.

Okay I like keeping it simple I like it!! So what do you mean by traditional reactor or mist??

mrkookm 02-21-2013 07:28 PM

Quote:

Originally Posted by RyanR. (Post 2602930)
Okay I like keeping it simple I like it!! So what do you mean by traditional reactor or mist??

Not sure about how you have and how large a setup you are planning for, but here's a few things I've tried. I tried many more, with bioballs, sponge, bottles, you name it...but no pics to back it up.

The 4in PVC reactor was the best reactor I made. The performance was excellent with no mist ever getting into the tank, but I like mist- just a preference. I might use it a gain with my new build, but we'll see. Other than that the tall ones worked well & the short I didn't like. Too many bubbles & burps when Co2 was upped to keep up with the sump & flow.

I'm using a new method now, well not new but different. Very small powerhead with the impeller modded, but I'm using a eHeim 2213 on a 30gal at the moment so Co2 is easily achieved with only 60bpm Mist quality is excellnet, i.e., very fine mist that does not spoil the aesthetics. So far I'm leaning towards this for my 105gal build, but it's going to be a toss up between this and the reactor.

I'll prolly post that in the future when I finally get my new tank up and running.

Traditional:

16~18" tall made from 2in PVC with outflow placed in the pump intake line.
http://i121.photobucket.com/albums/o210/mrkookm/2.jpg
http://i121.photobucket.com/albums/o210/mrkookm/5.jpg

3ft using 2in PVC:
http://i121.photobucket.com/albums/o...ft-reactor.jpg

4in PVC reactor 27in tall - best I've made!
http://i121.photobucket.com/albums/o...eactor1jpg.jpg
http://i121.photobucket.com/albums/o.../reactor-1.jpg

http://i121.photobucket.com/albums/o...m/reactor2.jpg

http://i121.photobucket.com/albums/o210/mrkookm/r5.jpg


Mist:

Feeding Co2 on the intake of external pump
http://i121.photobucket.com/albums/o210/mrkookm/4.jpg
http://i121.photobucket.com/albums/o210/mrkookm/3.jpg
http://i121.photobucket.com/albums/o210/mrkookm/1z.jpg

Mazzei injector:
http://i121.photobucket.com/albums/o210/mrkookm/1q.jpg
http://i121.photobucket.com/albums/o...kookm/loop.jpg
http://i121.photobucket.com/albums/o...kookm/can1.jpg
http://i121.photobucket.com/albums/o...kookm/can3.jpg

Mist via Encamat mod impeller, was a dedicated Co2 only pump:
http://i121.photobucket.com/albums/o...ookm/mesh9.jpg
http://i121.photobucket.com/albums/o...ookm/mesh5.jpg
http://i121.photobucket.com/albums/o...ookm/mesh3.jpg
http://i121.photobucket.com/albums/o...ookm/mesh8.jpg
http://i121.photobucket.com/albums/o...ookm/mesh7.jpg
http://i121.photobucket.com/albums/o210/mrkookm/in3.jpg
http://i121.photobucket.com/albums/o210/mrkookm/in4.jpg

Needle Wheel Pump:
http://i121.photobucket.com/albums/o210/mrkookm/s6.jpg
http://i121.photobucket.com/albums/o210/mrkookm/s4.jpg
http://i121.photobucket.com/albums/o210/mrkookm/s2.jpg
http://i121.photobucket.com/albums/o210/mrkookm/53.jpg

Smaller DC pump for misting, never put into service:
http://i121.photobucket.com/albums/o210/mrkookm/nh1.jpg
http://i121.photobucket.com/albums/o...kookm/nh14.jpg
http://i121.photobucket.com/albums/o...kookm/nh13.jpg
http://i121.photobucket.com/albums/o...kookm/nh12.jpg

ftwchopper 02-22-2013 01:45 AM

Quote:

Originally Posted by Rich Guano (Post 2571362)
Here is a youtube video that demonstrates the method using a soda bottle rather than the vacuum tube.

Effective CO2 aquarium diffuser. 100% solubility. - YouTube

This is kind of like the one i use but im using a large gravel vac filled with bioballs.Water comes in from the top and co2 from the bottom.Seems to work perfect.

iant 02-22-2013 07:10 PM

Quote:

Originally Posted by RyanR. (Post 2569802)
Has anyone ever thought of creating a CO2 diffuser made of a long tube coiled around where you have bubbles flowing up the coils and the water flowing down? It seems as if you could achieve 100% diffusion pretty easily. Any thoughts? Anybody ever tried this?


you are describing exactly what an internal co2 reactor is. and I think by far the best method of diffusing co2 in water. lots of DIY guide online. 1 advise I have is to make sure you have enough water flow to keep co2 bubbles in the chamber but not up the empeller at the same time not too much to push it down and out the the chambers outlet.


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