What working pressure do I want for my co2? - The Planted Tank Forum
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post #1 of 23 (permalink) Old 06-23-2015, 11:09 PM Thread Starter
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What working pressure do I want for my co2?

I am currently setting up my co2 system and I am trying to figure out what working pressure is supposed to be. Any advice?

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post #2 of 23 (permalink) Old 06-23-2015, 11:15 PM
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Need a little more info before a suggestion can be made. DIY reactors typically run around 20psi. In tank ceramic diffusers have specific recommendations, usually around 30psi. I have a hang on the back AquaClear filter and am running about 15psi to that one.


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post #3 of 23 (permalink) Old 06-23-2015, 11:22 PM Thread Starter
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I made a 20" cerges reactor, I also have a eheim 2075 pro 3 filter and its a 75g tank

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post #4 of 23 (permalink) Old 06-23-2015, 11:26 PM
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Then I would suggest 20psi. That is what I am running on my Marineland C-360 with a cerges reactor on a 75g tank.


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post #5 of 23 (permalink) Old 06-23-2015, 11:34 PM Thread Starter
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How many bps you running?

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post #6 of 23 (permalink) Old 06-23-2015, 11:48 PM
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Bbs

Your gonna have to run way more bps than you can count. I have a steady stream going into my 60 gallon planted tank. Even at a fast rate , my 5 lb tank lasts for months. Check into a pH controller. Makes injecting a whole lot easier.


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post #7 of 23 (permalink) Old 06-24-2015, 12:09 AM
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I am running 8-9bps. Used a 60 frame per second camera to actually figure this out. Just looking at the bubble counter it looks almost like a steady stream. Again, my controller shuts things off when I get too much cO2. If you don't have a controller, than somewhere in the 5 bubbles per second range would be close to correct.


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post #8 of 23 (permalink) Old 06-24-2015, 12:44 AM
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On my 75 with a reactor I do about 25 psi wp. I would do less, maybe 15-20, but the Aquateck reg likes it a little higher.

Bubble rate is too many to count. I started with about 5 and it wasnt enough, but that would probably be a safe place to start.


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post #9 of 23 (permalink) Old 06-24-2015, 04:43 PM
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I use 10 psi as it's easier for me to dial in the bubble rate and I'm using a powerhead to diffuse
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post #10 of 23 (permalink) Old 06-24-2015, 10:03 PM Thread Starter
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I was finally able to get my cerges reactor hooked up properly and it silent. So i am now ready to finally get the co2 going and start dialling it in.

I am aiming for 20psi working pressure, and I am aiming for 3-4 bubbles per second. I will be watching fish and ph closely. I got a instant read ph meter to watch for the drop.

I have been reading that people tend to try and get a 1 point drop in about an hour and be able to maintain that ph.

all the advice is greatly appreciated. Keep it coming

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post #11 of 23 (permalink) Old 06-24-2015, 11:32 PM
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FYI, from my experience it takes a fair amount of cO2 to get a 1ph drop in 1-2 hours (i.e. more than 5 bps). Then ounce you are at the 1 ph drop, it takes a bit less cO2 to keep it at the 1 ph drop. Also, read somewhere that dropping the pH .5 takes much less cO2 than dropping it 1.0 pH. If you shoot for 1.5 pH drop it takes a huge amount of cO2 - if that helps any.


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post #12 of 23 (permalink) Old 06-25-2015, 12:35 AM Thread Starter
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thanks, that does help.

since I am just starting out I am being careful. I will slowly up it till I get my desired results. I value the life I have in my tank and I want to be careful.

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post #13 of 23 (permalink) Old 06-25-2015, 12:57 AM
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LOL, have to agree with you - lot more fun watching my rainbow fish than my sword plant.


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post #14 of 23 (permalink) Old 06-25-2015, 01:37 AM Thread Starter
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Lol yup

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post #15 of 23 (permalink) Old 06-25-2015, 07:55 PM
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When I used pressurized CO2 I found it best to start with the CO2 pressure around 20 psi, then using the regulator knob to adjust the bubble rate instead of trying to nudge the needle valve accurately. If you try this at much more than 20 psi it is just as hard to adjust bubble rate with the regulator knob as it is with the needle valve. (Of course a really good needle valve avoids this problem)

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