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Old 01-05-2013, 07:31 AM   #2
R.sok
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I use just plane sand, but some people use dirt with a sand cap..etc, I don't have enough info on substrates so hopefully someone will chime in.

On my diy c02 I just use airline tubing *been fine for 3 months*

with my diy c02 I have one bottle of yeast with tubing going into a bottle of water & then out into my diffuser *no check valve* But a lot of people seem to run them, I have no problems without them
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