co2 and bacteria - The Planted Tank Forum
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post #1 of 3 (permalink) Old 11-12-2009, 02:47 AM Thread Starter
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co2 and bacteria

Hey all!

I have a question...
Maybe a dumb question but…….. Here goes…. I hope it’s in the right thread. Does pumping co2 into the canister filter in some way, affect the bacteria in your filter? In a good way or bad way? Just a thought..... I don't know but I'm sure someone here does. Thank you all in advance!
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post #2 of 3 (permalink) Old 11-12-2009, 04:53 AM
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All of us who use CO2, and have a canister filter would have a problem if this is a problem. As far as I can recall I have never seen any reports of such problems. So, that tells me there is no problem, or if there is, it is too small an effect to be concerned about.

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post #3 of 3 (permalink) Old 11-12-2009, 11:10 AM
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Hi dempsec1, it's not a problem because biological filtration is being performed by the plants. In a well planted tank, bacteria are just not that important. In fact they require a lot of oxygen to change NH4 to NO2 to NO3, unlike plants which use CO2. So to answer the question it might effect the bacteria, but in a way that would be considerably better for the overall health of a planted tank. It's just not something we need to worry about.

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