Thought I'd post this to go along with my other CO2 post... if this should go in DIY section, feel free to move it there.
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Gather materials
- 1 bottle with cap (coke bottle, for example)
- warm water
- 1 cup sugar
- 1 tsp yeast
- some airline
- a CO2 diffuser
- drill / souldering iron
- pliars / pinchers
Fill the bottle about 2/3 with warm water
Add 1 cup of white table sugar, and shake till disolved
Using a drill bit that is slightly smaller than the width of your airline to drill a hole in the cap.
Cut the airline on an angle to make a point.
Poke the point through the hole in the cap
Pull the airline through about 1/2 inch using pliars or tweezers
By now, the sugar should be completely disolved
Take 1/2 tsp of yeast
Put the yeast in the bottle
Close the bottle
Attach your diffuser or whatever you're using to the other end of the tube
And put the diffuser in your tank!