diy CO2 Question - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 07-15-2012, 01:25 PM Thread Starter
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diy CO2 Question

I have a question about a diy co2?

How do you control the number of bubbles? I mean what do you do if your system is making to much co2?

Also is there a link how to make a diy defuser?
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post #2 of 9 (permalink) Old 07-15-2012, 01:49 PM
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You can't really control the bubbles on DIY CO2.. if it's making too much just reduce the amount of yeast your adding, play with it a little until you get it where you like it. I use an airstone to diffuse, but just search the forums for other ways to do it. I believe if you click on 'Articles' at the top of the page, there are DIY diffuser instructions there.
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post #3 of 9 (permalink) Old 07-15-2012, 03:32 PM
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Playing with your mixture is the only safe way to control the amount of co2 produced. Less yeast will yield a slower co2 production over a longer period of time, more yeast will produce higher co2 production over a shorter period of time. There are many factors at play, such as ambient temps, type of yeast, type of food for the yeast, additives, etc... The more you research yeast reactors the more ideas you'll find to experiment with. I found a lot of useful information using the search function on this website.

Hope this helps!
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post #4 of 9 (permalink) Old 07-15-2012, 05:05 PM
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Great info from acmarauder.

If you're in a bad situation with getting too much CO2 currently and don't want to scrap your bottle, then you could plug up an air pump. Get some more O2 pumping in the tank to run out some of the CO2.

For diffuser, there are a million and one ways to make them. Search on Youtube for videos. If you can spend a small bit of money, get a powerhead that you can plug the CO2 tubing into (instead of the little aeration control hose). That will really help distribute the CO2 around your tank and get the most out of your DIY CO2.


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post #5 of 9 (permalink) Old 07-15-2012, 07:19 PM Thread Starter
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thanks. Every one for your help. Ill have to try and see what happens.
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post #6 of 9 (permalink) Old 07-15-2012, 11:58 PM
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You could attach an air regulator. Just make sure to never completely turn it off or else there might be an explosion and the room will smell like beer.

http://ecx.images-amazon.com/images/...YL._AA300_.jpg


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post #7 of 9 (permalink) Old 07-16-2012, 12:52 AM
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I used to use a gang valve when I was experimenting with a couple of 3 liter bottles used together. 6 liters of DIY can make a fair amount of CO2, but its a pain.
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post #8 of 9 (permalink) Old 07-16-2012, 02:38 AM
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Quote:
Originally Posted by Kai808 View Post
You could attach an air regulator. Just make sure to never completely turn it off or else there might be an explosion and the room will smell like beer.

http://ecx.images-amazon.com/images/...YL._AA300_.jpg
A regulator is a good way to burst the CO2 bottle. If you shut off the flow of CO2 from the bottle, the pressure will build up high enough to rupture the bottle.

Using the air injection fitting on a powerhead for CO2 is a bad idea. That injection system acts like a crude venturi - it sucks CO2 into the water jet. But, putting suction on a DIY CO2 line can end up sucking the sugar/yeast solution into the tank, a very bad idea. If, instead, you let the CO2 bubble into the powerhead inlet, there is little or no suction involved, and the CO2 bubbles go through the little pump rotor, getting chopped up into lots of much smaller bubbles, making it much easier for the CO2 to dissolve into the water and for the bubbles to be spread all over the tank.

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post #9 of 9 (permalink) Old 07-16-2012, 02:53 AM
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DIY CO2 into Internal Backwall Biofilter example

I insert an airstone in the two large gravel chambers of the following diagram in one tank and it is awesome. Bubbles trickle up the gravel but are forced down by the flow giving plenty of time to dissolve, then the water is distributed throughout the tank by the multiple tiny output holes. Some may interject at the idea of an airpowered unit and CO2 together but it works really well. Consider the premise that used water going into the unit is deficient in CO2 to begin with. Nutrients can also be added to the gravel chambers for slow, even distribution.

Last edited by LAKE; 07-21-2012 at 08:56 AM.
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