Order of DIY CO2 - The Planted Tank Forum
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post #1 of 20 (permalink) Old 09-16-2015, 03:29 AM Thread Starter
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Order of DIY CO2

Is this the right order?

2L Yeast --> check valve --> Gas Separator --> control valve --> bubble counter --> diffuser

I bought coke bottle cap with a gauge on eBay. Just realized that it is for the citric acid and baking soda method. It's the Popular A and B caps. Do you think it will will still work with yeast? I have no experi nce with the citric acid/baking soda method. Also, What gauge level should i be worried if the yeast bottle can explode due to the pressure? Thanks
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post #2 of 20 (permalink) Old 09-16-2015, 04:22 AM
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Could you post a pic of the system your using?

Last edited by somewhatshocked; 10-26-2015 at 07:18 PM. Reason: .
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post #3 of 20 (permalink) Old 09-16-2015, 01:33 PM Thread Starter
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Quote:
Originally Posted by goatnad View Post
Could you post a pic of the system your using?
Didn't make it yet, just the typical coke bottle setup.
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post #4 of 20 (permalink) Old 09-16-2015, 02:09 PM
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Looks to be correct order. I dont see why it would not work with a yeast mix. you may just be able to put a yeast mixture in each bottle. I dont think I would worry about the pressure. most will be going into your aquarium.

edit: did not realize how the citric acid method works, so it may not work with yeast. why not try out that method?
https://www.plantedtank.net/forums/sh...d.php?t=815241

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Last edited by rragan; 09-16-2015 at 02:16 PM. Reason: Post research
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post #5 of 20 (permalink) Old 09-16-2015, 04:02 PM
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Only thing I would move would be the check valve. Put just before the diffuser that way the water will not be able to flow back into the system. If you don't then when you change out bottles it will back flow into your bubble counter. Was is a gas seperator? Never seen that before.

Last edited by somewhatshocked; 10-26-2015 at 07:16 PM. Reason: .
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post #6 of 20 (permalink) Old 09-16-2015, 07:09 PM
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You COULD use that, but to be honest I think using it with the citric acid would be a more steady flow and give you the option to turn it off at night. I am getting ready to dump the yeast for citric acid myself. The reason I say this is the way the Citric Acid works is based on the pressure difference in the 2 chambers, as the baking soda chamber looses pressure there is more in the citric acid acid side and it flows into the other chamber and adds more citric acid to react and create more pressure. End of the night you turn valve down and both chambers stabilize pressure and CO2 should (In theory) stop pretty fast.

If you DO use yeast with that, I would NOT turn it off at night by the control valve being the yeast will keep working all night, need to vent it off someplace or you have a pressure bomb.
Also, as others said, move the check valve.

EDIT>>>
Quote:
Originally Posted by goatnad View Post
Was is a gas seperator? Never seen that before.
I took this as using the 2nd bottle as a makeshift "Bubble Counter" to "Separate" gas?

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post #7 of 20 (permalink) Old 09-16-2015, 07:27 PM
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If using yeast and sugar you want a check valve after each bottle so you can remove each bottle without losing pressure from the other bottle. Then both of those go to the bubble counter and then to your diffusor.

I have never used the citric acid method but it seems like it would be more expensive than 2 cups of sugar and a 1/2 tsp of yeast a week.
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post #8 of 20 (permalink) Old 09-16-2015, 07:35 PM
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Ah ok. Good idea on the valves with each bottle. I might have to start doing this so it takes less time to get my flow going after a bottle change.Ty for the info

Last edited by somewhatshocked; 10-26-2015 at 07:13 PM. Reason: .
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post #9 of 20 (permalink) Old 09-16-2015, 08:13 PM
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why do you need a gas separator and a bubble counter?
I guess by gas separator you mean another bottle with water through which the CO2 will come out of the yest-reactor. Well, that is your bubble counter
put check-valve after each bottle, and just in case, one after the bubble-counter bottle.

you should be good to go.

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post #10 of 20 (permalink) Old 09-16-2015, 09:08 PM
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For what size of tank is this for?

You need more than 1 bottle to make the co2 consistent. Check out this site
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post #11 of 20 (permalink) Old 09-16-2015, 09:42 PM
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Quote:
Originally Posted by Me View Post
If you DO use yeast with that, I would NOT turn it off at night by the control valve being the yeast will keep working all night, need to vent it off someplace or you have a pressure bomb.
I see there are 2 sets, one with plastic valve and one with metal. The metal one seems to have a pressure relief on it so if you got the one that has a side cylinder coming out of the side of the pressure gauge I would think it would not explode, just release some CO2 if too much gets created when off when turned off.

Here is a pic of what I am talking about...

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post #12 of 20 (permalink) Old 09-16-2015, 10:57 PM
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Quote:
Originally Posted by Hilde View Post
For what size of tank is this for?

You need more than 1 bottle to make the co2 consistent. Check out this site
Lol.. Making wine while pumping co2, win win. If I had more room I would do that, have all the brewing supplies from making Mead.

Back on topic, citric acid and baking soda are not that expensive and the way it perks from one to the other seems a little more consistent than yeast so less need for multiple bottles. I am just guessing being I am still doing yeast, but about to switch to ca\bs.

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post #13 of 20 (permalink) Old 09-17-2015, 12:25 AM
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That is exactly what I use. Not sure if it's the exact brand but all the parts are the same. Bought mine on evilbay and the pressure gauge doesn't work. The system still works and my bottles don't ever feel like they are going to explode.

Last edited by somewhatshocked; 10-26-2015 at 07:10 PM. Reason: .
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post #14 of 20 (permalink) Old 09-17-2015, 12:45 AM
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Quote:
Originally Posted by Dropline View Post
Lol.. Making wine while pumping co2, win win. If I had more room I would do that, have all the brewing supplies from making Mead.

Back on topic, citric acid and baking soda are not that expensive and the way it perks from one to the other seems a little more consistent than yeast so less need for multiple bottles. I am just guessing being I am still doing yeast, but about to switch to ca\bs.
Here is a thread on the citric acid Co2 system. I tried and trashed the system. I wish I had started with a flow control system using a paintball tank.
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post #15 of 20 (permalink) Old 09-17-2015, 02:34 AM Thread Starter
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Quote:
Originally Posted by alphabeta View Post
why do you need a gas separator and a bubble counter?
I guess by gas separator you mean another bottle with water through which the CO2 will come out of the yest-reactor. Well, that is your bubble counter
put check-valve after each bottle, and just in case, one after the bubble-counter bottle.

you should be good to go.
Gas Separator is empty 2L bottle. It it used incase some of the yeast solution touches the tubing. It would flow up due to the pressure. So the yeast solution will now sit at the bottom of the gas separator and not go any farther in the system. It is a means of safety. I didn't want to use the bubble counter as the gas separator because it defeats the purpose and I have to wash out the contaminated bubble counter.

Bump:
Quote:
Originally Posted by Hilde View Post
For what size of tank is this for?

You need more than 1 bottle to make the co2 consistent. Check out this site
16 gallon. I wanted to make so I change every month. Changing every week sounds like a hassle

Bump:
Quote:
Originally Posted by goatnad View Post
That is exactly what I use. Not sure if it's the exact brand but all the parts are the same. Bought mine on evilbay and the pressure gauge doesn't work. The system still works and my bottles don't ever feel like they are going to explode.
http://i00.i.aliimg.com/wsphoto/v1/2...-Kit-Gauge.jpg

What I bought. Probably not going to work for yeast.

Bump:
Quote:
Originally Posted by goatnad View Post
Only thing I would move would be the check valve. Put just before the diffuser that way the water will not be able to flow back into the system. If you don't then when you change out bottles it will back flow into your bubble counter. Was is a gas seperator? Never seen that before.
Check valves are put in with the arrow of CO2 gas flow correct?
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