DIY Co2 via Citric Acid question. - The Planted Tank Forum
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post #1 of 20 (permalink) Old 07-15-2015, 02:49 AM Thread Starter
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DIY Co2 via Citric Acid question.

Hey guys, I'm planning to do a DIY Co2 reactor via the citric acid method. I've learned that the baking soda part has the 1:1 mixture with water and the citric acid has 1:3 mixture.

i.e.
200g baking soda = 200ml water
200g citric acid = 600ml water

When the mix between the baking soda and citric acid solution mixes, will the water somewhat evaporate with the Co2 gas? Or would it just increase the water in the baking soda solution? I was planning to use a 6L bottle citric acid mix and a 2L bottle baking soda mix, so that got me wondering.
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post #2 of 20 (permalink) Old 07-15-2015, 02:58 AM
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Increase in the baking soda bottle

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post #3 of 20 (permalink) Old 07-15-2015, 03:00 AM Thread Starter
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Oh okay, figures. So that means the baking soda solution will get diluted right?
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post #4 of 20 (permalink) Old 07-15-2015, 03:10 AM
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Yes. Maybe my experience with it will help.
https://www.plantedtank.net/forums/sh...d.php?t=815241
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post #5 of 20 (permalink) Old 07-15-2015, 05:10 AM Thread Starter
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Thanks! Read through the whole thread, I think. If I'm not mistaken, this is the best solution so far.

Bottle A = Citric Acid 400g to 600ml water
Bottle B = Baking Soda 300g to 200ml water

Will have to check your thread for any formula update.
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post #6 of 20 (permalink) Old 07-15-2015, 09:55 AM
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So far it is. Will test it again in August after vacation.
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post #7 of 20 (permalink) Old 07-15-2015, 04:10 PM Thread Starter
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I saw the video on your thread about a diy pressurized co2 bottle using, what it seems, a used up co2 bottle. Now, this just struck me. I have an aluminum water bottle available. I actually drank from it when this struck me. Would that be viable when going with the diy pressurized co2? Or even just co2 refills? Of course that is after adding some stuff to make it viable like regulators, valves and stuff. Well, would the fittings fit? Would the bottle be able to handle the pressure?
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post #8 of 20 (permalink) Old 07-15-2015, 05:03 PM Thread Starter
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Here's what my bottle basically looks like.

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post #9 of 20 (permalink) Old 07-15-2015, 05:03 PM
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I think fittings would a problem. I doubt diy pressure would be a problem. Your not going to get a place to fill it with co2 if that's what you mean. Bottles have to be pressure tested first.
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post #10 of 20 (permalink) Old 07-15-2015, 05:07 PM Thread Starter
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Yeah looks like it. But do you have any idea of what kind of regulator or something could possibly fit in the bottles top?

EDIT:
Here's the video on your thread.

https://www.youtube.com/watch?v=hQ9nfWXZZ-s

Do you think the one that the guy connects at the top of the can somewhat fit the water bottle?
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post #11 of 20 (permalink) Old 07-15-2015, 07:04 PM Thread Starter
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Found something about those aluminum drinking bottles. Looks like they're also uses as pressurized canister or something, similar to the paintball co2 canisters.

In this link you can see a picture of the aluminum bottle fitted with some kind of valve:
http://www.spudfiles.com/pneumatic-c...opic18368.html

In this link you can see that the bottles are used for an air powered rifle. Images don't work but better check out the video link.
http://www.spudfiles.com/pneumatic-c...opic17748.html

Video link for those who doesn't want to scan the thread:
http://www.dailymotion.com/swf/x8r10...or-le-d4_sport
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post #12 of 20 (permalink) Old 07-18-2015, 02:44 PM Thread Starter
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Hey guys, I was able to drop by Ace Hardware a while ago and found some plumbing stuff. Something like a female-to-male adapter for tubes. I think there might be a size that would fit on my aluminum water bottle. Wasn't able to test but there are different sizes, and I found one that looks like it would fit. I'm not good at DIY's but can anyone list some parts needed to make this aluminum water bottle into a pressurized co2 canister? Valves? tubes?
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post #13 of 20 (permalink) Old 07-18-2015, 06:43 PM
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No reputable CO2 seller would put CO2 into a bottle that has not been pressure tested first. In fact it is illegal to do so. CO2 bottles will routinely be at about 700-800 psi, and will go even higher if the air temperature goes up. An aluminum bottle like you showed will not even come close to passing the pressure test.

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post #14 of 20 (permalink) Old 07-19-2015, 01:33 PM Thread Starter
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Really? Well, I guess its time to scrap the idea lol! Wasn't aiming for like 700-800 psi or anywhere near it. I guess like 100? not really sure, but just enough to last at least a month.
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post #15 of 20 (permalink) Old 07-19-2015, 04:45 PM
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Quote:
Originally Posted by Miki117 View Post
Really? Well, I guess its time to scrap the idea lol! Wasn't aiming for like 700-800 psi or anywhere near it. I guess like 100? not really sure, but just enough to last at least a month.
On the other hand if your going to try the method where you add critic acid, baking soda and water to your bottle at one shot that may work. No idea what pressure those systems operate at.
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