A couple of questions about co2 - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 04-19-2013, 07:03 AM Thread Starter
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A couple of questions about co2

I have a DIY co2 system on my 29 gallon aquarium. I have the co2 tube hooked up to the intake tube of my filter. At first I say little bubbles come out of the output of the filter, but since the system has been running for a week I haven't noticed bubbles escaping the filter, could this be because the bubbles are getting stuck in the filter sponge and getting better absorbed?

I also notice this whitish bacteria stuff on my filter sponge. It looks like thick globs of beneficial bacteria, except its kind of whitish gray. What could that be?
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post #2 of 7 (permalink) Old 04-19-2013, 07:51 AM
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Re: A couple of questions about co2

Well to know for sure if the co2 is getting dissolved efficiently, you should have a drop checker in the tank to give you a visual indication if it's working.

The white stuff is a byproduct of the yeast.. It's like fungus or something. I get that on my diffuser from my DIY system too. It's harmless and i usually just wipe it away during my routine PWC's.
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post #3 of 7 (permalink) Old 04-19-2013, 09:31 AM Thread Starter
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I don't have a drop checker, but I do know that my tap water ph is about 7.5 and the ph in my aquarium is 6.4. From what I have been told, if the ph goes down a degree, then I have around 30ppm.
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post #4 of 7 (permalink) Old 04-19-2013, 10:35 AM
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Re: A couple of questions about co2

pH is an indicator of co2 saturation, so there is some truth in that advice. But DIY co2 is unstable for the most part, especially at the start and close to the end of the generator's cycle. This in turn causes pH swings and to be quite honest, a drop checker is inexpensive and i don't see any reason not to have one. This would alleviate any doubt if your DIY system is working, despite not seeing any bubbles coming out from your filter -- hence answering your question.
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post #5 of 7 (permalink) Old 04-19-2013, 09:24 PM Thread Starter
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Ya I think that i'll invest in one soon
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post #6 of 7 (permalink) Old 04-20-2013, 12:47 AM
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For that white stuff with DIY, after the sugar yeast mixture, send that gas into a separator (a bottle with water) and bubble the gas thru that water. That solved my issue with teh nasty white stuff.
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post #7 of 7 (permalink) Old 04-20-2013, 02:50 AM Thread Starter
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I already have that on the setup, its also a bubble counter too.
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