diy co2 how is the amoubnt of co2 regulatered - The Planted Tank Forum
 
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post #1 of 10 (permalink) Old 03-02-2009, 07:00 AM Thread Starter
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diy co2 how is the amoubnt of co2 regulatered

is there a regulator or drop checer or something like that required to regulat co2 output
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post #2 of 10 (permalink) Old 03-02-2009, 07:02 AM
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You cannot regulate DIY CO2. Well, not easily and reliably anyways.

Don't worry, DIY CO2 in tanks 10 gallons or larger generally won't be able to produce levels that are toxic to livestock.
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post #3 of 10 (permalink) Old 03-03-2009, 04:19 PM
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Quote:
Originally Posted by epicfish View Post
You cannot regulate DIY CO2. Well, not easily and reliably anyways.

Don't worry, DIY CO2 in tanks 10 gallons or larger generally won't be able to produce levels that are toxic to livestock.
X2,
however, If for some reason you are getting too much CO2 from DIY, increase your surface turbulence.

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post #4 of 10 (permalink) Old 03-03-2009, 04:56 PM
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if i think the bubble count is too high i release some pressure by opening the cap of the bottle a little bit its not that reliable but hey it is diy
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post #5 of 10 (permalink) Old 03-11-2009, 02:08 AM
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I thnk I managed to get a toxic level with DIY CO2

Quote:
Originally Posted by epicfish View Post
You cannot regulate DIY CO2. Well, not easily and reliably anyways.

Don't worry, DIY CO2 in tanks 10 gallons or larger generally won't be able to produce levels that are toxic to livestock.
I think I just managed to achieve a toxic level of CO2 with my DIY. I have a 38 gallon tank. Normally my ph is about 7-7.2, and my kh is about 9. Obviously, this is not a toxic level of CO2. Well, I tweaked my mix a bit, and went to 1&1/3 cups of sugar, 1 teaspoon of Fleischman yeast, in a 2 liter soda bottle. This is run through a Red Sea Powerhead with Venturi. Well, my ph droped in one day from 7 to about 6.7 and my kh went from 8 to 6, which if you do the figuring is a lot of CO2.

Fish are alive, but I think the error was that I also cleaned my filter a bit, and redirected the spray bar away from the surface. The powerhead was producing a very fine mist, and my one bottle of yeast mixture is producing about a bubble a second.

My plants look really nice, but the fish are all at the surface. Maybe I need to add some buffer to my water, or at least turn down my water softener a bit.

Mark
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post #6 of 10 (permalink) Old 03-11-2009, 04:57 AM
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Originally Posted by markkoelsch View Post
I think I just managed to achieve a toxic level of CO2 with my DIY. I have a 38 gallon tank. Normally my ph is about 7-7.2, and my kh is about 9. Obviously, this is not a toxic level of CO2. Well, I tweaked my mix a bit, and went to 1&1/3 cups of sugar, 1 teaspoon of Fleischman yeast, in a 2 liter soda bottle. This is run through a Red Sea Powerhead with Venturi. Well, my ph droped in one day from 7 to about 6.7 and my kh went from 8 to 6, which if you do the figuring is a lot of CO2.

Fish are alive, but I think the error was that I also cleaned my filter a bit, and redirected the spray bar away from the surface. The powerhead was producing a very fine mist, and my one bottle of yeast mixture is producing about a bubble a second.

My plants look really nice, but the fish are all at the surface. Maybe I need to add some buffer to my water, or at least turn down my water softener a bit.

Mark
Invest in a drop checker. The pH/kH chart is notorious for being inaccurate. If the fish are gasping at the surface, increase surface turbulence like Walter said. Airstone, powerhead pointed the surface...etc.
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post #7 of 10 (permalink) Old 03-11-2009, 12:07 PM
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You did a lot of things all at once. Changed the formula, cleaned the filter, redirected the spray bar.
I do the same thing when I work on a tank, I work on all of it. The problem there is that
it's hard to know exactly which thing pushed your tank over the edge.

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post #8 of 10 (permalink) Old 03-11-2009, 02:30 PM
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yea, I tend to do the same thing. Change everything all at once. I always have my spraybar pointed down though. I use two DIY co2 bottles on my 20 gallon and with the ladder style diffuser I have, it will make the fish stay at the top very quickly.

You could probably set up a needle vale setup, but it would be useless after a couple weeks, when the mixture is less potent.
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post #9 of 10 (permalink) Old 03-11-2009, 02:46 PM
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Please no needle valves or restrictions on the output.

It can make quite a nasty mess.
http://www.thekrib.com/Plants/CO2/yeast-disaster.html

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post #10 of 10 (permalink) Old 03-11-2009, 05:00 PM
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I maintain 1 bubble per second with two DIY bottles on a 10g tank with a bubble ladder and that barely keeps my drop checker green. I don't see how it would be possible to overdose a tank 4 times the size of mine.

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