Co2 recipe for 2.5gal - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 09-17-2015, 12:55 AM Thread Starter
Planted Tank Enthusiast
 
fishyfishy101's Avatar
 
PTrader: (8/100%)
Join Date: Nov 2014
Location: idk. I'm lost, please send help
Posts: 721
Co2 recipe for 2.5gal

I want to add co2 to a 2.5gal. I have thought about liquid carbon like excel, but I am gone frequently on work trips so I wouldn't be able to dose regularly. I'm hoping that because it's so small I can make it last a few weeks, maybe a month or more. I have a general idea of what I need, but I'm not sure on specifics. I know that the yeast feeding on the sugar is what produces co2. So it would stand to reason that adding more sugar and less yeast would make a lower amount of co2 that would last longer. If I could have one of you experts give me some instructions that would be appreciated. Thx
fishyfishy101 is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 09-17-2015, 01:20 AM
Moderator
 
Darkblade48's Avatar
 
PTrader: (3/100%)
Join Date: Jan 2008
Location: Toronto
Posts: 11,712
It's a bit more complicated than simply adding more sugar and reducing yeast, but overall, you will likely get a solution that lasts a bit longer.

By providing more sugar, yeast will continue to grow until waste products (ethanol being a large one) becomes toxic to them. Starting off with a smaller amount of yeast will mean that the growth curve will be somewhat shifted (i.e. slower logarithmic growth).

Anthony


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
and
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
Darkblade48 is offline  
post #3 of 6 (permalink) Old 09-17-2015, 01:43 PM Thread Starter
Planted Tank Enthusiast
 
fishyfishy101's Avatar
 
PTrader: (8/100%)
Join Date: Nov 2014
Location: idk. I'm lost, please send help
Posts: 721
Quote:
Originally Posted by Darkblade48 View Post
It's a bit more complicated than simply adding more sugar and reducing yeast, but overall, you will likely get a solution that lasts a bit longer.

By providing more sugar, yeast will continue to grow until waste products (ethanol being a large one) becomes toxic to them. Starting off with a smaller amount of yeast will mean that the growth curve will be somewhat shifted (i.e. slower logarithmic growth).
Ok, that's what I had thought. Could you point out to me a good recipe, or should I experiment?
fishyfishy101 is offline  
 
post #4 of 6 (permalink) Old 09-18-2015, 03:47 AM
Moderator
 
Darkblade48's Avatar
 
PTrader: (3/100%)
Join Date: Jan 2008
Location: Toronto
Posts: 11,712
Quote:
Originally Posted by fishyfishy101 View Post
Ok, that's what I had thought. Could you point out to me a good recipe, or should I experiment?
It's been years since I used DIY CO2, but from what I recall, I used to use 1.5 cups of sugar, 1/4 teaspoon of yeast, and filled a standard 2L pop bottle about 3/4 full of tepid water.

You might be able to find some other recipes that advise use of baking soda, etc, and this may extend the time the mix will last a little.

The largest factor for production may be the type of yeast you use. Using wine yeasts rather than the standard bread yeast will allow your mixture to last longer, but may increase your costs.

Anthony


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
and
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
Darkblade48 is offline  
post #5 of 6 (permalink) Old 09-19-2015, 05:01 PM
Planted Tank Enthusiast
 
PTrader: (0/0%)
Join Date: May 2015
Location: the desert
Posts: 541
The recipe I use lasts for a solid 2 weeks before I need to change a bottle.
2 liter bottle filled to top of label with luke-warm water.
2 cups sugar
1 tsp baking soda
In small bowl add 1 cup warm water, not hot but more than luke warm. Add 1 tsp sugar and whisk briskly with a fork.
Slowly add in 1/2 tsp REGULAR active dry yeast whisking with a fork to prevent clumping. The slower you shake the yeast in the better. And do not use rapid rise yeast.
Allow this to stand for 10 minutes whisking gently periodically. Then add to bottle but do not shake to mix. Screw cap on and you are done.

Bump: The recipe I use lasts for a solid 2 weeks before I need to change a bottle.
2 liter bottle filled to top of label with luke-warm water.
2 cups sugar
1 tsp baking soda
In small bowl add 1 cup warm water, not hot but more than luke warm. Add 1 tsp sugar and whisk briskly with a fork.
Slowly add in 1/2 tsp REGULAR active dry yeast whisking with a fork to prevent clumping. The slower you shake the yeast in the better. And do not use rapid rise yeast.
Allow this to stand for 10 minutes whisking gently periodically. Then add to bottle but do not shake to mix. Screw cap on and you are done.
keymastr is offline  
post #6 of 6 (permalink) Old 09-19-2015, 05:53 PM
Children Boogie
 
mistergreen's Avatar
 
PTrader: (13/100%)
Join Date: Dec 2006
Location: Cincinnati
Posts: 16,743
Temperature controls yeast production. cold->slow, warm->fast, hot->kills.

If you need more control, try baking soda and drip in acid at some rate.

Or baking powder, and drip in water at some rate.
mistergreen is offline  
Reply

Tags
None

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome