Is DIY yeast CO2 too much? - The Planted Tank Forum
 
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post #1 of 13 (permalink) Old 03-05-2012, 10:57 PM Thread Starter
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Is DIY yeast CO2 too much?

I have two 2 liter bottles on my 42 gallon hexagon. It is fed through the intake so that the bubbles are chopped up and then spit out as tiny bubbles. For some reason my fish seem to react negatively as if there is too much when I seal it up and cause it to go in the tank. What would cause this? Is it really too much CO2?

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post #2 of 13 (permalink) Old 03-05-2012, 11:00 PM
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how exactly are the fish reacting?
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post #3 of 13 (permalink) Old 03-05-2012, 11:34 PM
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I have a couple of bottles on my 20 and if they're both a fresh mix than my fish will gasp at the surface. You can definitely kill them with diy co2


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post #4 of 13 (permalink) Old 03-05-2012, 11:35 PM Thread Starter
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They start to go to the top of the tank and the glass catfish's gills start to turn red. It's not ammonia or nitrates because it only happens when the CO2 is up. I will definitely not set up both bottles again at the same time because last time I nearly killed all of my fish doing that. That may be my problem

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post #5 of 13 (permalink) Old 03-05-2012, 11:41 PM
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Are you using the standard yeast/sugar mixture? I don't see how two 2L bottles could be gassing out fish in a 42g tank unless there's more yeast than normal in the mix.
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post #6 of 13 (permalink) Old 03-05-2012, 11:44 PM
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I agree I use 2 2liters on my 10gal and have no problems...In fact I could probably use a bit more co2..My mix is 2 cups sugar and 1/4tsp yeast.
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post #7 of 13 (permalink) Old 03-06-2012, 12:08 AM
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I use wayyyy more yeast than that. Like3.5 tsps


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post #8 of 13 (permalink) Old 03-06-2012, 12:41 AM
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do u have like 0 surface agitation?
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post #9 of 13 (permalink) Old 03-06-2012, 01:45 AM Thread Starter
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No I have some surface agitation but not a lot. I forgot to say last time I forgot to dechlorinate the last batch so not only was CO2 going in but evaporated, chopped up chlorine... Yeah that wasn't pretty. I think I'll be ok but my dad told me that they seemed to be reacting badly to it but I thnk he was overreacting because of last time's chlorine problem. Thanks for the help I think it will be fine now! If it doesn't affect you guys it shouldn't affect me so I think I'm good now.

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post #10 of 13 (permalink) Old 03-06-2012, 02:44 AM
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Cut back on the yeast. It'll multiply so quickly that you're going to end up having difficulty keeping up with sugar and keeping levels stable.

Stick to about a half teaspoon of yeast - preferably champagne yeast.


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post #11 of 13 (permalink) Old 03-06-2012, 03:17 AM
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Not to thread jack, but do you maintain the same colony of yeast for long periods of time by adding more and more sugar over time? I just let mine burn out and keep remixing often.


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post #12 of 13 (permalink) Old 03-06-2012, 03:27 AM
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Quote:
Originally Posted by Al Slick View Post
I use wayyyy more yeast than that. Like3.5 tsps
3.5 tsps yeast?! Wooooooooow. 7 times more than I used per 2L bottle back when I was using DIY CO2!

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post #13 of 13 (permalink) Old 03-06-2012, 03:48 PM
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in a jam, add an airstone
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