How to make DIY CO2? - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 04-17-2006, 07:13 PM Thread Starter
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How to make DIY CO2?

Ive tried to make Diy CO2 once, but it didn't work. what is the easiest, best way to make it?
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post #2 of 7 (permalink) Old 04-17-2006, 08:20 PM
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you probably killed the yeast. Try it again using warm or luke warm or luke cold water.
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post #3 of 7 (permalink) Old 04-17-2006, 08:28 PM
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Check for leaks on your unit by dripping soapy water on the tubes and joints. If there are bubbles, then dry it off and seal it with aquarium silicone. In addition with killing the yeast, a tiny leak could make your unit....how should we say...."inoperable."

Once you get your DIY CO2 unit sealed, and mixture correct, you should be fine.
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post #4 of 7 (permalink) Old 04-17-2006, 08:30 PM
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What did you do the first time? If we know what kind of mixture you used and how you set it up, we might be better able to figure out what went wrong.

There are a lot of threads in the DIY section of the forum. If you do a search there, you'll see some good information (recipes, set-ups, etc.)

Good luck -- I just started up DIY CO2 myself and have found that it makes a big difference. My system is two 2-Liter soda bottles placed in a box to keep my cats from tipping them over. I drilled holes in the bottle caps slightly smaller than airline tubing, then used pliers to pull a 4-6" piece of tubing through each hole so it sticks down inside the bottle about 1".

I add 2 cups of sugar, 1/2 tsp of regular bread yeast (plan to try champagne yeast soon), and water up to where the curve of the bottle is just about to start (so I leave a few inches of headroom at the top in case it foams).

My system then is set up like this:

Each bottle with cap that has a few inches of tubing sticking out -> its own checkvalve -> a few more inches of tubing for each bottle-> T-Connector -> one piece of tubing that runs up the outside of my aquarium -> another check valve at the top -> tubing that runs down into the aquarium (held to the glass by suction cup airline tubing holders) -> limewood airstone placed under my filter intake, which is working pretty well so far

I change one bottle each week so that each bottle is running for 2 weeks. This keeps the CO2 pretty consistent, I've found.

Hope that helps.

29 g planted community tank, 2.48 WPG, DIY CO2, Greg Watson ferts --
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post #5 of 7 (permalink) Old 04-17-2006, 08:38 PM
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I'm trying to think, how many loaves of bread did I make~thousands? in my other career-life. The only time the yeast did not work was if it got killed. And assuming it is airtight, and with a live yeast solution, you should be good to go with all this information.

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post #6 of 7 (permalink) Old 04-21-2006, 05:51 PM
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Quote:
Originally Posted by uncskainch





My system then is set up like this:

Each bottle with cap that has a few inches of tubing sticking out -> its own checkvalve -> a few more inches of tubing for each bottle-> T-Connector -> one piece of tubing that runs up the outside of my aquarium -> another check valve at the top -> tubing that runs down into the aquarium (held to the glass by suction cup airline tubing holders) -> limewood airstone placed under my filter intake, which is working pretty well so far



Hope that helps.

Any particular reason you keep the airstone under the intake? I thought that if the CO2 bubbles go through the canister they can cause cavitation.
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post #7 of 7 (permalink) Old 04-21-2006, 06:16 PM
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I have a HOB filter and lots of folks here seem to place the diffusers under the filter intake without problems, so I figured I'd try it. In practice, the tiny bubbles from the limewood diffuser come out a couple of inches below the intake and don't seem to all go straight into it, so I don't know that I'm getting any real positive or negative effect from the placement. I am getting good CO2 production, though, as measured by PH/KH.

29 g planted community tank, 2.48 WPG, DIY CO2, Greg Watson ferts --
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-- 5 gallon planted Marineland 5 gallon hex with 15w 6500k CF, Excel, 100% flourite substrate -- RCS & male dwarf puffer --
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-- 2.5 gallon planted MiniBow w/10w 6500 k CF, Excel -- mystery snail & RCS --
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