Go Back   Aquarium Advice - Aquarium Forum Community > General Aquarium Forums > DIY Projects
Click Here to Login

Join Aquarium Advice Today
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
Old 08-30-2003, 11:22 AM   #1
Aquarium Advice Regular
Join Date: Jun 2003
Location: Flint, MI
Posts: 52
DIY CO2 Question

Last week I decided to make my own CO2 system for my 10gal tank. I used the standard method, 1 cup sugar, 1 teaspoon yeast, 1 teaspoon baking soda, filled with water to 3 inches from top. It worked great, I was getting 3 bubbles every 8 seconds after 2 hours of setup. It got even better after that, 10 bubbles every 2 seconds. That lasted for about 4 days and my plants flourished. Then it really slowed down, 2 bubbles every 20 seconds. Then the yeast, sugar, and baking soda seemed to clump together and sink to the bottom. I shook the 2 liter to get everything mixed up but after an hour it all sunk to the bottom again. Now it is the 7th day and I get 1 bubble every 1m30s. I am using a regular airstone as a diffuser. What could be going wrong?

Atlantis is offline   Reply With Quote
Old 08-30-2003, 02:58 PM   #2
Posts: n/a
I use 2 cups sugar with a 2 liter bottle, lasts much longer. I get about 17 days of good bubbles out of that.

How did you attach the tubing to the bottle cap? Check that for leaks.

My best guess is that it used up all the sugar. The clumping/sinking is normal.

What kind of filter do you have on the tank? If possble, run the co2 tube right into the filter intake. it smashes up the bubbles and you get better adsorption of co2 ito your water.

If that is not an option, I'd get the Hagen co2 diffuser (around 10 bucks I believe). you don't have to purchase the whole system, just the co2-proof tubing, and the diffuser (essentially a bubble ramp, the bubbles have a long time under water, and the co2 gets adsorbed.)

Either of these methods is way better than a standard airstone, which is very inefficient.
  Reply With Quote
Old 08-30-2003, 05:42 PM   #3
Aquarium Advice Addict
Join Date: Jun 2003
Location: Earth
Posts: 1,227
yes, more sugar, less yeast

I use 2 cups sugar, 4 cups water, 1/2 tsp yeast, no soda in a 2 liter bottle.

you can try as little as 1/4 tsp yeast - it will take a few days to get "started" but will last almost a month, fairly even production curve.

most yeast = faster production = more gas

more sugar = longer production

so why not use a LOT of yeast? well, the yeast slowly poisons itself as it eats the sugar. the more yeast, the more poison. at a point, it won't mater how much sugar you use, the yeast will not be able to eat it all before poisoning themselves.
justDIY is offline   Reply With Quote
Old 08-30-2003, 06:01 PM   #4
Aquarium Advice Regular
Join Date: Jun 2003
Location: Flint, MI
Posts: 52
There definitely is not a leak, the airline is connected to the bottle through a rubber cork.

I have an aquaclear mini filter. Should I put the airstone in the intake section or not use an airstone at all and just put the tube in the intake area?

I will try adding more sugar and less yeast to my mixture when I mix up a new batch. It sounds like the best way to get good results is to use trial and error.
Atlantis is offline   Reply With Quote

co2, diy, diy co2

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY CO2 Question Mattei DIY Projects 4 06-22-2009 02:24 PM
Diy Co2 question permagrin Freshwater & Brackish - Planted Tanks 2 03-02-2009 11:10 PM
diy co2 question timwag2001 Freshwater & Brackish - Planted Tanks 3 03-02-2009 10:05 PM
My DIY CO2 question... Lonewolfblue DIY Projects 6 08-15-2006 12:19 AM
DIY CO2 Question Wood_Dog Freshwater & Brackish - Planted Tanks 14 07-31-2006 10:34 PM

» Photo Contest Winners

All times are GMT -4. The time now is 06:43 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.