pressurized co2 or lots of fish - The Planted Tank Forum
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post #1 of 28 (permalink) Old 07-26-2012, 06:08 PM Thread Starter
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pressurized co2 or lots of fish

how much fish would you need in comparison to pressurized co2
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post #2 of 28 (permalink) Old 07-26-2012, 06:33 PM
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1000 in a 5 gallon

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post #3 of 28 (permalink) Old 07-26-2012, 06:52 PM
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1000 in a 5 gallon
....it could work...

-Mike
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post #4 of 28 (permalink) Old 07-26-2012, 08:45 PM
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Sorry! I think we may be missing the question. Are you asking how many fish it would take to do the same job for plants that Pressure CO2 does? If that is the question, there may be some confusion as the two provide different things for the plants. Fish and food will provide nitrate as fertilizer for the plants but CO2 provides carbon for them.
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post #5 of 28 (permalink) Old 07-26-2012, 09:01 PM
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Fish breathe out CO2 I think is what he meant. But they breathe out a very, very small amount, right?
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post #6 of 28 (permalink) Old 07-26-2012, 09:12 PM
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No amount of fish would ever be comparable to injecting CO2 into your tank.
Think of it like this, a no CO2 tank gets the smallest amount of CO2 because it is just from the fish
a DIY yeast CO2 method is more CO2 than the fish give off, but even that isn't really considered a lot of CO2, I figure this because it can safely be ran 24 hours a day
Pressurized CO2 is the greatest amount of CO2 injection available, so much in fact that if you aren't careful you can easily over do it.

If you are trying to avoid a fully pressurized system, then perhaps you can get away with just DIY, but no amount of fish will ever replace CO2 injection, even in a low light scenario

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post #7 of 28 (permalink) Old 07-26-2012, 09:35 PM
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Originally Posted by HybridHerp View Post
No amount of fish would ever be comparable to injecting CO2 into your tank.
Think of it like this, a no CO2 tank gets the smallest amount of CO2 because it is just from the fish
a DIY yeast CO2 method is more CO2 than the fish give off, but even that isn't really considered a lot of CO2, I figure this because it can safely be ran 24 hours a day
Pressurized CO2 is the greatest amount of CO2 injection available, so much in fact that if you aren't careful you can easily over do it.

If you are trying to avoid a fully pressurized system, then perhaps you can get away with just DIY, but no amount of fish will ever replace CO2 injection, even in a low light scenario
SURE they will. u just need 1000/ 5 gallons of tank

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post #8 of 28 (permalink) Old 07-26-2012, 09:43 PM
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SURE they will. u just need 1000/ 5 gallons of tank
I'm sure if he got larger fish he could get away with even 500
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post #9 of 28 (permalink) Old 07-26-2012, 09:50 PM
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its possibe!~

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post #10 of 28 (permalink) Old 07-26-2012, 10:12 PM
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Sorry! I think we may be missing the question. Are you asking how many fish it would take to do the same job for plants that Pressure CO2 does? If that is the question, there may be some confusion as the two provide different things for the plants. Fish and food will provide nitrate as fertilizer for the plants but CO2 provides carbon for them.
Fish food contain a lot of carbon. amino acids/proteins contain carbon, carbohydrates contain carbon, fats contain carbon. Fish burn these compound with O2 releasing CO2.

Fish food also contain all the other ferts.

Please ignore any spelling/grammatical errors. I'm swedish and sometimes I'm also drunk.

Last edited by m8e; 07-26-2012 at 10:17 PM. Reason: -n
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post #11 of 28 (permalink) Old 07-26-2012, 10:19 PM
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I'm sure if he got larger fish he could get away with even 500
And then the question is- Could you fit those 500 fish into 5 gallons of water.... Hmm and then you couldnt see the plants


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post #12 of 28 (permalink) Old 07-26-2012, 10:57 PM
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And then the question is- Could you fit those 500 fish into 5 gallons of water.... Hmm and then you couldnt see the plants
You probably could if you used enough pressure - and it's pressurized CO2 the OP's looking to replace, so it's all good.
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post #13 of 28 (permalink) Old 07-27-2012, 03:10 AM
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And then the question is- Could you fit those 500 fish into 5 gallons of water.... Hmm and then you couldnt see the plants
sounds like an experiment!


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post #14 of 28 (permalink) Old 07-27-2012, 03:25 AM
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The best way to approach this is don't try it. Don't try to substitute something that comes free with some that cost. Usually if you have to pay for it, it has a greater affect than the alternative. Your better of doing diy co2. The amount of fish needed for this would deplete the oxygen in the water way to fast and more than likely parish from a poor substitute.
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post #15 of 28 (permalink) Old 07-27-2012, 03:39 AM
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sounds like an experiment!
Ive got a better idea. Hire a collage student low on funds to blow through an airtube into your tank!


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