Too much c02 from diy - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 03-04-2008, 11:06 PM Thread Starter
 
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Too much c02 from diy

I have a 9x9x9" tank. I have my tried and true 2L co2 bottle and glass jar bubble counter.

Mixture is 2cups sugar and 1tbsp yeast (read this somewhere years ago and it has worked well on larger tanks).

However, this mix is far too potent to start is it almost killed the fish if i had not noticed the gasping and unhooked the system and a quick water change.

thank tank is planted fairly heavily.

Would a change in my mixture be the best course of action? Smaller mix in a smaller bottle?


Any advice is most welcome!


cheers
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post #2 of 7 (permalink) Old 03-05-2008, 12:00 AM
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Welcome to the Planted Tank! Yes, less mixture via a smaller bottle would reduce the CO2 output accordingly.

You could try to use less sugar in your existing bottle too. But that might not reduce it much. Maybe a 1l bottle would be your best bet.


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post #3 of 7 (permalink) Old 03-05-2008, 12:20 AM
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That seems like alot of yeast too. I use 1/8-1/4 teaspoon for my juice bottles that are ~1.5 litres.
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post #4 of 7 (permalink) Old 03-05-2008, 02:35 AM
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Quote:
Originally Posted by mrbisbing View Post
I have a 9x9x9" tank. I have my tried and true 2L co2 bottle and glass jar bubble counter.

Mixture is 2cups sugar and 1tbsp yeast (read this somewhere years ago and it has worked well on larger tanks).

However, this mix is far too potent to start is it almost killed the fish if i had not noticed the gasping and unhooked the system and a quick water change.

thank tank is planted fairly heavily.

Would a change in my mixture be the best course of action? Smaller mix in a smaller bottle?


Any advice is most welcome!


cheers
Your problem is you are using 1tbsp of yeast and not 1/4 tsp or even a 1/2 tsp. Try using less yeast.


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post #5 of 7 (permalink) Old 03-05-2008, 02:38 AM
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Keep the 2cups sugar and cut WAY BACK on the yeast. 1/4 to 1/2 teaspoon is plenty. A pinch goes along way..

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post #6 of 7 (permalink) Old 03-05-2008, 03:00 AM
 
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it also really depends on where the bottle is... in my basement I get allmost no co2 unless I use about 1 TBS because it is so cold ambient temp. But yeah, best way to control is use less yeast.
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post #7 of 7 (permalink) Old 03-05-2008, 02:58 PM Thread Starter
 
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I have a new mix here today, 1/4tsp yeast, 2cups sugar and a pinch of baking soda.

We'll see, thanks for the advice folks!
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