diy co2 help - The Planted Tank Forum
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post #1 of 10 (permalink) Old 02-12-2016, 03:00 AM Thread Starter
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diy co2 help

i am trying to build a diy co2 generator with 3 20 oz bottles yeast sugar and water. I've mixed it up and water a day and nothing is happening?? whats going on?
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post #2 of 10 (permalink) Old 02-12-2016, 03:28 AM
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More information will help. Is this set up now, so it delivers the CO2 to the aquarium? Do you have a bubble counter in the system? Have you checked the whole thing for leaks by using a mix of detergent and water applied generously to every single joint in the system, and waited 5-10 minutes to look for mounds of tiny foamy bubbles which indicate leaks?

Hoppy
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post #3 of 10 (permalink) Old 02-12-2016, 03:35 AM
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My recipe.
3 liter bottle 2/3 full, 2 cups sugar, 1 teaspoon baking soda, 95 degree water.
Activate 3/4 teaspoon of yeast in separate say 4 to 8 ounces of 95 degree water.
Still until all yeast is mixed up and pour into 3 liter bottle with other ingredients.
Bubbles start in 6 to 12 hours, full strength @ around 24 hours.

Did you activate the yeast with high enough temperature of water?


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Last edited by Maryland Guppy; 02-12-2016 at 03:36 AM. Reason: edit
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post #4 of 10 (permalink) Old 02-12-2016, 03:50 AM Thread Starter
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i re made the mixture. i boiled the water and mixed the yeast separately. everything isthe same except for the 2 liter bottle and the baking soda. i put 1 cup of sugar in each bottle and 1/4 teaspoon in each aswell. i did this before you posted, so should i add baking soda? or will it be fine? thanks a ton guys
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post #5 of 10 (permalink) Old 02-12-2016, 03:53 AM
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Why did you boil the water? Anything over 105 degrees can kill the yeast.


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post #6 of 10 (permalink) Old 02-12-2016, 03:56 AM
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Quote:
Originally Posted by zackg337 View Post
i re made the mixture. i boiled the water and mixed the yeast separately. everything isthe same except for the 2 liter bottle and the baking soda. i put 1 cup of sugar in each bottle and 1/4 teaspoon in each aswell. i did this before you posted, so should i add baking soda? or will it be fine? thanks a ton guys
Water at boiling point(212) will kill the yeast and not activate it.
90 to 100 degrees will just activate it.

Baking soda acts as a buffer to balance CO2 production over time.


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post #7 of 10 (permalink) Old 02-12-2016, 04:37 AM Thread Starter
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ok ok theres my problem! I've boiled it the past two times. ill go redo it now and give an update in the morning
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post #8 of 10 (permalink) Old 02-12-2016, 05:37 AM
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even if it is just slightly too hot, it will drastically reduce the amount of gas... I like making my bottle in the afternoon, by the next morning it is ready to plug in.

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Hi. I'm back.
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post #9 of 10 (permalink) Old 02-16-2016, 11:28 PM Thread Starter
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thanks guys! co2 is now running smooth. borrowed a food thermometer from work to get it at exactly 100. saw results within 2 hours and put it in the tank the next morning!
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post #10 of 10 (permalink) Old 02-16-2016, 11:54 PM
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Quote:
Originally Posted by zackg337 View Post
i am trying to build a diy co2 generator with 3 20 oz bottles yeast sugar and water. I've mixed it up and water a day and nothing is happening?? whats going on?
IMO you would be best served to use just one big bottle, as it's just easier.

Just a noob


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Last edited by Nlewis; 02-16-2016 at 11:54 PM. Reason: Edit
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