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DIY CO2 Generator

This is a discussion on DIY CO2 Generator within the DIY Aquarium forums, part of the TFK Resources category; --> I'm gonna have to pass on that, it smells pretty nasty when I change it out!...

Old 03-01-2007, 11:46 PM   #11
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I'm gonna have to pass on that, it smells pretty nasty when I change it out!
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Old 03-20-2007, 07:46 PM   #12
Off topic: Like the Dude said you can drink it but it can make you sick, but if you distill it, it makes around 87-98% alcohol witch you can add water to it and make it around 38-45% and then you run it threw 2 carbon filter made from PVC pipes and you got perfectly safe to drink Vodka baby :D
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Old 03-30-2007, 04:42 PM   #13
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well distilling it can be dangerous if you dont know what your doin... it can create methynol gas wich can make you go blind.... or so ive heard
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Old 04-20-2008, 11:02 AM   #14
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Hello, I thought I'd revive this, as I followed these directions (with a few modifications), and I took photos along the way.

-Co2 will lower the pH of your water, especially in a tank with low kh (buffering capacity). Water parameters must be carefully monitored after adding co2
-DO NOT use a glass bottle. The gas can build up in the bottle, especially if there is a blockage in the tubing, causing an explosion. Plastic can expand and will be more tolerant of increased pressure. Also, if the bottle explodes, plastic will not become the dangerous shrapnel that glass will be.

Drilled a hole in cap with my Dremel to fit the tubing:

Put anti-siphon valve in CO2 resistant tubing:

Put tubing through hole in cap about 1/2 inch:

Seal around hole and tubing in cap (I used a hot glue gun):

Here's the tubing all connected:

I decided to test out a co2 diffuser which I ordered on ebay for $2 (not including shipping), many diffusers will not work with DIY systems because it's not pressurized, but this one is advertised to work:

Add one cup sugar:

1 Teaspoon yeast:

1 Teaspoon baking powder:

Add warm (not hot) water:

Leave a few inches of space for the gas:

Add to tank!

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Old 05-19-2008, 09:37 PM   #15
co2 diffusion

the end of my diy co2 generator tubing is under aboot four inches of sand, gravel, and lava rock. aboot twice a minute I get a burst of small bubbles. I will construct a diffuser next paycheck, am I getting any co2 diffusion with this setup?? I set this up 48 hours ago so I can't tell if my plants are responding yet
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Old 05-19-2008, 09:44 PM   #16
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probably not, at least not much....
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Old 07-08-2008, 03:26 PM   #17
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Hello, I pretty much did this exact set-up (except with an airstone on the end) and I had one problem. The fluid from the soda bottle would sometimes evaporate up (dont ask me how) then drip down the line and into the tank. I didnt know if this was dangerous or not so I took it off the tank. Does this ever happen on your system? Also where did you get that diffuser? Has it worked so far?
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Old 07-08-2008, 03:30 PM   #18
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No, it doesn't happen to me that I've noticed. You're probably adding too much water to begin with. Try with less ingredients! Good luck!
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Old 07-09-2008, 10:14 AM   #19
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hey can i use a 1 liter bottle as its only an 8 gallon tank? and if i can should i jkust half the recipe?
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Old 07-09-2008, 10:30 AM   #20
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Yes, you can.
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