The Planted Tank Forum - View Single Post - DIY CO2, how much water?
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Old 12-18-2011, 12:25 AM   #7
jstehman
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I doubt that your DIY C02 will build enough pressure to go through a diffusor disk. Better try a bubble ladder or diffuse through a powerhead.

Fill a 2L bottle 1/2 full of lukewarm water. Add 1 to 1 1/2 cups white sugar. Shake until dissolved. Fill water to 3/4 full with lukewarm water. Water temps over 70 will kill yeast . Add 1/2 to 3/4 teaspoon yeast. Shake again.

Wait.

You want it to be a slow, steady reaction. Too much yeast or sugar will result in increased c02 production but reduced duration.
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