How long does DIY CO2 last? - The Planted Tank Forum

 
LinkBack Thread Tools Display Modes
post #1 of 12 (permalink) Old 11-28-2008, 01:18 AM Thread Starter
Algae Grower
 
Christine T's Avatar
 
Join Date: May 2008
Location: Albany, NY
Posts: 129
Question How long does DIY CO2 last?

I used a 2L bottle, 2 cups of sugar, and 1/2 tsp yeast. I'm just wondering how long this will last? I have the air line feeding into my powerhead.

Also, I've read that adding baking soda will make the mix last longer, any truth to this?
Christine T is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 11-28-2008, 02:07 AM
Planted Member
 
Join Date: Oct 2008
Location: Alberta, Edmonton
Posts: 206
I do a very similar recipe and it lasts about three weeks until it stops producing as much. I change it every three weeks for my nano.

EPC # 330

5.5g nano - Fail.. Guppy mania.

18"cube vivarium - 4 x ventrimaculitus breeding pairs.

10g vert Azureus vivarium

34g Cadlight reef
dylanserbin is offline  
post #3 of 12 (permalink) Old 11-28-2008, 04:11 AM
Algae Grower
 
Join Date: May 2008
Location: Montana
Posts: 82
I use 1 tsp of yeast and an additional 1 tsp of baking powder (not soda). It lasts between three and five weeks with varying levels of pressure.
tremendotron is offline  
post #4 of 12 (permalink) Old 11-28-2008, 05:52 AM
Are these real?
 
Wasserpest's Avatar
 
Join Date: Jun 2003
Location: Monterey, CA
Posts: 15,481
I always used a bit less yeast, like 1/4 tsp, and let it stand over night to give it some time to ramp up and displace the air with CO2. It normally lasted 2-3 weeks.

WRT baking soda, I think the benefit depends on what sort of water you have. I have pretty hard water, and adding baking soda lead to a slowly foaming mixture, not good. For softer water, baking soda might be beneficial to buffer things and help to extend the live span of the yeast.
Wasserpest is offline  
post #5 of 12 (permalink) Old 11-28-2008, 02:13 PM
Planted Member
 
Sarge's Avatar
 
Join Date: Sep 2008
Location: Savannah, GA
Posts: 265
baking soda can be made from limestone, and adding an acid (lemon juice) makes Co2, adding baking soda to yeast and sugar? I don't see the science behind it, but I haven't tried it so I won't knock it. I'm going to play with lemon juice and baking soda for Co2 recipes as far as planted tanks go, not sure if it will last as long as yeast and sugar because of the eating time for yeast compared to an acid.

My DIY Co2 didn't last too long at all actually I like a constant flow so every 4-5 days I was changing out the mixture.
Sarge is offline  
post #6 of 12 (permalink) Old 11-28-2008, 02:56 PM Thread Starter
Algae Grower
 
Christine T's Avatar
 
Join Date: May 2008
Location: Albany, NY
Posts: 129
So, around 2-3.

Quote:
WRT baking soda, I think the benefit depends on what sort of water you have. I have pretty hard water, and adding baking soda lead to a slowly foaming mixture, not good. For softer water, baking soda might be beneficial to buffer things and help to extend the live span of the yeast.
Thanks for the explanation.

Thanks everyone
Christine T is offline  
post #7 of 12 (permalink) Old 04-24-2013, 04:46 PM
Algae Grower
 
Join Date: Dec 2010
Location: Long Island, NY
Posts: 54
DIY CO2 Mixture Duration

Quote:
Originally Posted by Christine T View Post
I used a 2L bottle, 2 cups of sugar, and 1/2 tsp yeast. I'm just wondering how long this will last? I have the air line feeding into my powerhead.

Also, I've read that adding baking soda will make the mix last longer, any truth to this?


I use a 2L bottle, 2 cups of granulated sugar and a heaping teaspoon of SAF yeast (the quality of instant yeast varies and can make a substantial difference in the length of time this concoction can last) for my DIY CO2 mix.

I usually get at least three weeks out of a bottle of this DIY yeast before I have to recharge it.

I used Fleishmann's before the SAF and it did not last anywhere as long.

SAF is also about .23 an ounce, while Fleishmann's is about $3.50 an ounce. I purchase several 1LB bags of SAF yeast at a time and freeze all but one bag. I leave this bag in the refrigerator until I am ready to make
more DIY CO2. Keeping the yeast frozen enables it to last for years without losing its potentcy. And keeping it in the refrigerator allows it to last for several months without losing any of its oomph.

It's a very cost effective and safe (as opposed to pressurized CO2) way of
enhancing plant growth.
Jimmyblues is offline  
post #8 of 12 (permalink) Old 04-24-2013, 05:50 PM
Planted Tank Enthusiast
 
gSTiTcH's Avatar
 
Join Date: Feb 2013
Location: Jacksonville, Florida
Posts: 838
Quote:
Originally Posted by Jimmyblues View Post
It's a very cost effective and safe (as opposed to pressurized CO2) way of
enhancing plant growth.
I find that pressurized is more cost effective and safe, so long as you take the right precautions when handling the tank, etc. Sugar gets expensive. Also, what is your time worth? The less I'm mucking with CO2 mixtures, the more time I have to take care of other things in and out of the tank.

The baking soda is supposed to offset the acids and alcohols produced during the fermentation process. IME, my mixtures lasted much longer without baking soda. This goes back to Wasserpest's response. I have water hard enough to stall a wood chipper. That might be a factor.

Either way, I got about 3 weeks out of a bottle using a full packet of Fleischmanns, 2c sugar, and water at about 100* from start to 0 output. I had two bottles that I alternated, replacing one each week, so never did the bottles actually hit 0 output while on the tank.
gSTiTcH is offline  
post #9 of 12 (permalink) Old 04-24-2013, 07:40 PM
Planted Tank Guru
 
herns's Avatar
 
Join Date: May 2008
Location: Los Angeles
Posts: 3,195
Quote:
Originally Posted by Jimmyblues View Post
I use a 2L bottle, 2 cups of granulated sugar and a heaping teaspoon of SAF yeast (the quality of instant yeast varies and can make a substantial difference in the length of time this concoction can last) for my DIY CO2 mix.

I usually get at least three weeks out of a bottle of this DIY yeast before I have to recharge it.

I used Fleishmann's before the SAF and it did not last anywhere as long.
I used Lalvine wine yeast. Pretty fast to ferment. I think the no. is Ec-118.
herns is online now  
post #10 of 12 (permalink) Old 04-24-2013, 07:43 PM
Planted Tank Guru
 
herns's Avatar
 
Join Date: May 2008
Location: Los Angeles
Posts: 3,195
[QUOTE=gSTiTcH;3211009]I find that pressurized is more cost effective and safe, so long as you take the right precautions when handling the tank, etc. Sugar gets expensive. Also, what is your time worth? The less I'm mucking with CO2 mixtures, the more time I have to take care of other things in and out of the tank.QUOTE]


+1. For small tank, DIY is ok. but for larger tanks, its a pain mixing yeast and sugar every week. If you run high light to bring the colors of plants, DIY always ends up with algae because of fluctuations.
herns is online now  
post #11 of 12 (permalink) Old 04-24-2013, 08:44 PM
Planted Tank Obsessed
 
Mizuhuman's Avatar
 
Join Date: Mar 2013
Location: Philadelphia, PA
Posts: 426
[quote=herns;3211801]
Quote:
Originally Posted by gSTiTcH View Post
I find that pressurized is more cost effective and safe, so long as you take the right precautions when handling the tank, etc. Sugar gets expensive. Also, what is your time worth? The less I'm mucking with CO2 mixtures, the more time I have to take care of other things in and out of the tank.QUOTE]


+1. For small tank, DIY is ok. but for larger tanks, its a pain mixing yeast and sugar every week. If you run high light to bring the colors of plants, DIY always ends up with algae because of fluctuations.
will it help if i dose excel along with co2 to control algae growth? because I plan to make a diy co2 for my 75g and i'm worried about the inconsistency of the diy co2 causing algea growth. particularly bba
Mizuhuman is offline  
post #12 of 12 (permalink) Old 04-25-2013, 01:06 PM
Planted Tank Guru
 
herns's Avatar
 
Join Date: May 2008
Location: Los Angeles
Posts: 3,195
Re: How long does DIY CO2 last?

[quote=Mizuhuman;3212329]
Quote:
Originally Posted by herns View Post

will it help if i dose excel along with co2 to control algae growth? because I plan to make a diy co2 for my 75g and i'm worried about the inconsistency of the diy co2 causing algea growth. particularly bba
75g is a big tank for DIY. Unless you go low tech.

Go pressurized.

Sent from HTC One device using Tapatalk2
herns is online now  
Reply

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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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