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Old 06-13-2019, 07:10 AM   #1 (permalink)
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Default New to co2 question

Hi all,

I just got my first CO2 System. It's a Blau Nano CO2 set. I got instructions on how to set it up, however it doesn't seem to be working right. Starting from the regulator being completely closed, i slowly inch it open. For a long time, no bubbles are formed, and then all of a sudden it's an explosion of CO2. Like a huge amount of bubbles.

What can cause this? How do I get it to emit a normal amount of bubbles?

Thanks.
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Old 06-13-2019, 08:18 AM   #2 (permalink)
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Default Re: New to co2 question

CO2 systems, for aquariums, need to include a very good needle valve, to regulate the minute flow rate of CO2 we need. We set the regulator to produce about 30 psi CO2, instead of the 700 psi CO2 in the bottle, and we have the needle valve adjusted so only a few bubble per second flow into the tank. From what I can tell from the photo I found for that CO2 system, it doesn't include a needle valve.
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Old 06-13-2019, 09:42 AM   #3 (permalink)
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Default Re: New to co2 question

OK, that makes sense. I'll see if the store can sell me that valve to make it more accurate. I am also wondering: I've gotten it to produce what seems like an OK amount of bubbles (very carefully), but now in addition to the micro bubbles there are also very large ones escaping from the side and top of the bubble counter. Is this normal?
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Old 06-13-2019, 02:01 PM   #4 (permalink)
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Default Re: New to co2 question

Quote:
Originally Posted by pablojones View Post
OK, that makes sense. I'll see if the store can sell me that valve to make it more accurate. I am also wondering: I've gotten it to produce what seems like an OK amount of bubbles (very carefully), but now in addition to the micro bubbles there are also very large ones escaping from the side and top of the bubble counter. Is this normal?
That isn't normal, and it could be a check valve installed backwards, or a check valve that takes too high a pressure to open it. I sounds like the pressure builds up in the bubble counter, then suddenly goes out in a big bubble, dropping the pressure again, so it repeats over and over. I would be strongly tempted to return that CO2 system and get a different type.
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Old 06-13-2019, 02:08 PM   #5 (permalink)
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Default Re: New to co2 question

OK, thanks for your help.
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Old 06-14-2019, 12:43 PM   #6 (permalink)
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Default Re: New to co2 question

In case anyone in the future searches for Blau Nano CO2 kit, it didn't come with a check valve. I had one of my own and a different bubble diffuser, which fixed the too-large bubble problem, however it kept jumping from ~40 to 120 bubbles per second with nothing in between no matter how minuscule the adjustment. I'll be returning it for something else.
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