CO2 By Human Respiration - The Planted Tank Forum
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post #1 of 37 (permalink) Old 10-19-2007, 01:43 AM Thread Starter
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CO2 By Human Respiration

Has anyone seen this on TheKrib? He says it takes 3-5 minutes every two days and it is enough for a 75 gallon. http://www.thekrib.com/Plants/CO2/mouth.html
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post #2 of 37 (permalink) Old 10-19-2007, 02:01 AM
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Yeah, say it before, but are you really willing to blow into a bag every two days? o_O I think I'd find it annoying eventually.
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post #3 of 37 (permalink) Old 10-19-2007, 02:03 AM Thread Starter
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If it saves me $150 then maybe.
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post #4 of 37 (permalink) Old 10-19-2007, 02:27 AM
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I figure you'll get what you pay for with this one...
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post #5 of 37 (permalink) Old 10-19-2007, 02:32 AM
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It won't work... effectively.

Human breath is CO2, nitrogen, and other air, all except oxygen. The air contains about 79% nitrogen. Thus, you breath out about 79% nitrogen. Add the other elements and you have less than 15 percent CO2 going in...
I forgot the exact figures.

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post #6 of 37 (permalink) Old 10-19-2007, 02:47 AM
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Technically, it should also contain oxygen as well. Think about it, how else would rescue breathing or CPR work? This line of reasoning would mean that you could rely on your fish to produce enough CO2 for your plants. Yes, technically, it will work, but it's really crappy.

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post #7 of 37 (permalink) Old 10-19-2007, 02:59 AM
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post #8 of 37 (permalink) Old 10-19-2007, 03:01 AM
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yeah I think you only use 4% oxygen out of the air you breath so... I don't believe your gonna get that much c02
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post #9 of 37 (permalink) Old 10-19-2007, 03:05 AM
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The DIY yeast method would be much better and still very cheap.
At least its only annoying every 2 weeks to a month.


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post #10 of 37 (permalink) Old 10-19-2007, 03:05 AM
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Quote:
Originally Posted by fishscale View Post
Think about it, how else would rescue breathing or CPR work?
CPR has nothing to do with Oxygenation, if has to do with restarting a person's involuntary breathing and heartbeat.
Oxygen is only needed once circulation resumes in order to reduce the chance of damage to oxygen starved brain cells.
Our lungs are very efficient Oxygen exchange systems. whatever oxygen is found in our exhale is unused from our windpipe.


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post #11 of 37 (permalink) Old 10-19-2007, 03:09 AM
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Wow where do I get one of them straw set ups. Thats just what I was looking for. As for O2 that we take in is around 9-8% and we release about 4% of that. So all in all you are only putting out 4% CO2

Whats this green fuzzy stuff thats growing in my tank.
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post #12 of 37 (permalink) Old 10-19-2007, 03:14 AM
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IM not even sure that you can Produce enough psi to make it go through the plate
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post #13 of 37 (permalink) Old 10-19-2007, 05:01 AM
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IM not even sure that you can Produce enough psi to make it go through the plate
....so whos gonna step up and say they can blow hard?...
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post #14 of 37 (permalink) Old 10-19-2007, 11:13 AM
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....so whos gonna step up and say they can blow hard?...
I think it was Rex that said in a post a couple weeks ago that he can suck harder than he blows

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post #15 of 37 (permalink) Old 10-19-2007, 01:43 PM Thread Starter
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So how come it worked for him?
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