passive co2 anyone done what this person does on youtube? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 04-22-2020, 10:55 PM Thread Starter
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passive co2 anyone done what this person does on youtube?

Hi guys,





i was trying to figure out how this man does his passive co2. i want to do passive co2 as well, i can't figure out what kind of a regulator and stuff he uses. Can anyone help or guide me in the right direction?


he uses a plastic wand of some sort, a co2 regulator and some knob to open it up.
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post #2 of 6 (permalink) Old 04-22-2020, 11:15 PM
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Yes, I have and I think a few others here have or do as well. It works to get CO2 up to 10 -maybe 15 PPM, but the bells have to be filled frequently. Mine emptied out in 4 to 6 hours and it became a daily (or 2-3x daily if I was home) chore. If you have a tank and a regulator, you're 90% the way to pressurized though, and there's really no comparison.

Nothing good happens fast in an ecosystem.
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post #3 of 6 (permalink) Old 04-23-2020, 12:00 AM Thread Starter
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ahh, very cool, what do you need to get that passive setup? i'd like to try it out. maybe you could share what you bought to get it working if it isn't to much trouble.
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post #4 of 6 (permalink) Old 04-23-2020, 03:55 PM
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It really takes almost nothing but a can of gas with a regulator on it, a plastic bottle (which will become brittle and break; these have to be replaced) and a length of CO2 resistant tubing. The guy in the video had a hook built which would have been handy to keep hands out of the water.
I held mine on with a Mag Float:

Here's a view in the tank:


My feeling on it is that it's much better than nothing, but adds another frequent "chore" to your maintenance. There were plenty of days I was driving to work and remembered I had failed to fill it. I don't know that passive could even be configured to give you 30 PPM levels safely (without risk of going too high). It worked much better for me than DIY did, but I eventually set that gas can up to a controller and never looked back.

Nothing good happens fast in an ecosystem.
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post #5 of 6 (permalink) Old 04-24-2020, 03:15 PM Thread Starter
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oh, i was more interested in what kind of a regulator i would need to do this. i'm not that familiar with this stuff so i wanted to get some stuff that works.

currently, i did a diy yeast and sugar co2 generator to see how co2 would affect the tank. just looking up on how to get off that eventually.

Bump: yeah, i figure you can probably add a few more bottles possibly to get a higher passive concentration. i just like to experiment lol, a time waster i guess. the process for me is just as fun as the results. i have to see how you measure co2 concentration as well. still new at this planted stuff.
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post #6 of 6 (permalink) Old 04-24-2020, 04:35 PM
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https://barrreport.com/threads/co2-ph-kh-table.10717/ This is a good rough estimate of how much CO2 you have by comparing KH and pH.

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