DIY CO2 Rig, take a look... - The Planted Tank Forum

 
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post #1 of 11 (permalink) Old 12-20-2013, 06:37 PM Thread Starter
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DIY CO2 Rig, take a look...

Does anyone see any flaws with this?

2x 2L pop bottles
1x Air valve
1x Air tubing

Used this mixture:
2cups of regular sugar
1/4th tsp of Baking Soda
1/4th tsp of Yeast -> expires in 2014
Warm water, not hot water.

Bottles are air tight so hopefully no leaks, this is for a 10gal tank.
waiting for any co2 to be created.


wish me luck
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post #2 of 11 (permalink) Old 12-20-2013, 06:40 PM Thread Starter
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So hopefully this works for now...
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post #3 of 11 (permalink) Old 12-20-2013, 06:45 PM
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Looks good. You can spray water around all tubing and if it bubbles then you may want to silicone around it.
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post #4 of 11 (permalink) Old 12-20-2013, 07:01 PM
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A cheap way to make water and airtight connections is to drill a hole in the cap to the exact outter dimension of silicone tubing. Place a short length of rigid silicone airline tubing (1/2" or so) over a short length of rigid airline tubing (1 1/2" or so). Force the end with the silicone tubing into the hole drilled into the cap. Then you can attach airline to the opposite end. Gives you a fit at the cap that's incredibly tight and durable and you don't have to worry about sealing the connection at the cap.
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post #5 of 11 (permalink) Old 12-20-2013, 07:16 PM Thread Starter
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Yep thats what I did... Drilled holes a little smaller then the air line and forced it through so its air tight.
the Valve on the cap is the same deal, however its not glued because if something gets blocked and the pressure builds, I would hope the valve would just pop off instead of large messy BANG lol
Waiting for this to make co2 is killing me lol

Anyone have ideas in how to enject the co2 into the tank without having a diffuser on hand?
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post #6 of 11 (permalink) Old 12-20-2013, 09:08 PM Thread Starter
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I got bubbles but soon as the tube went into the tank the added pressure stoped the bubbles.
maybe I just need more yeast in the mixture???
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post #7 of 11 (permalink) Old 12-20-2013, 09:15 PM
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i rather not break the seal, that means you will need to wait the pressure to build up again.

yeast will reproduce and multiply by itself, providing suitable environment

a warm water bath (make sure not exceed the optimal temp. and kill the yeast) can speed up the growth of yeast (warmth expand the gas as well, but that's just an illusion :p)

my 2c
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post #8 of 11 (permalink) Old 12-20-2013, 11:28 PM Thread Starter
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I just left it alone and its now got 1bubble per 1.5seconds or so.
I got it running at night But I DO have a air bubbler going with alot of surface movment, so I am not worried about gassing the 1 fish. Hes still realxing near the bottom.
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post #9 of 11 (permalink) Old 12-21-2013, 02:02 AM
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I tried using a valve like that and it ended up leaking. Save yourself the headache and get rid of it. Also use a smaller bubble counter or fill up that second 2 liter a lot more, you want as much co2 going to the tank as possible not sitting in that huge cavity in the bottle.
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post #10 of 11 (permalink) Old 12-21-2013, 02:07 AM Thread Starter
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Quote:
Originally Posted by TekWarren View Post
I tried using a valve like that and it ended up leaking. Save yourself the headache and get rid of it. Also use a smaller bubble counter or fill up that second 2 liter a lot more, you want as much co2 going to the tank as possible not sitting in that huge cavity in the bottle.
Thanks I will get an actual bubble counter + check valve.
for now I will fill the 2nd bottle with more water...
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post #11 of 11 (permalink) Old 12-21-2013, 08:10 PM Thread Starter
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For now I switched out the 2nd bottle for a 350ml bottle, filled 2" from the top...
Also removed the valve, I noticed that it was leaking, its now sealed.

I find that its producing about 1 bubble every 2seconds or so, is there anyway to make it get to 1 bubble per 1 second?
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